/usr/lib/x86_64-linux-gnu/pkgconfig/ is in libecore-dev 1.8.6-2.5.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-imf.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-audio.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-ipc.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-fb.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-input.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-evas.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-file.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/eldbus.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-imf-evas.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-input-evas.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-x.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/ecore-con.pc