/usr/include/libvirt-gconfig-1.0/ is in libvirt-glib-1.0-dev 0.1.6-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-capabilities-cpu-feature.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-capabilities-cpu-topology.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-capabilities-cpu.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-capabilities-guest-arch.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-capabilities-guest-domain.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-capabilities-guest-feature.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-capabilities-guest.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-capabilities-host.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-capabilities.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-address-pci.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-address-usb.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-address.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-channel.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-chardev-source-pty.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-chardev-source-spicevmc.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-chardev-source.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-chardev.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-clock.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-console.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-controller-usb.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-controller.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-cpu-feature.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-cpu.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-device.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-disk.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-filesys.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-graphics-sdl.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-graphics-vnc.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-graphics.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-input.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-interface-bridge.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-interface-network.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-interface-user.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-interface.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-memballoon.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-os.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-parallel.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-power-management.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-redirdev.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-seclabel.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-serial.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-smartcard-host-certificates.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-smartcard-host.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-smartcard-passthrough.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-smartcard.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-snapshot.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-sound.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-timer-pit.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-timer-rtc.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-timer.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain-video.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-domain.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-enum-types.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-helpers.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-interface.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-main.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-network-filter.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-network.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-node-device.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-object.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-secret.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-storage-permissions.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-storage-pool-source.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-storage-pool-target.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-storage-pool.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-storage-vol-backing-store.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-storage-vol-target.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig-storage-vol.h
/usr/include/libvirt-gconfig-1.0/libvirt-gconfig/libvirt-gconfig.h