/usr/lib/x86_64-linux-gnu/pkgconfig/ is in libsvn-dev 1.9.7-4ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_auth_gnome_keyring.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_auth_kwallet.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_client.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_delta.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_diff.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_fs.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_fs_base.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_fs_fs.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_fs_util.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_fs_x.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_ra.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_ra_local.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_ra_serf.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_ra_svn.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_repos.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_subr.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libsvn_wc.pc