/usr/lib/x86_64-linux-gnu/pkgconfig/bluedevil.pc is in libbluedevil-dev 2.0~rc1-6-g7bb223c-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | prefix=/usr
libdir=/usr/lib/x86_64-linux-gnu
includedir=/usr/include
Name: bluedevil
Description: BlueDevil library
Version: 2.0
Libs: -L${libdir} -lbluedevil
Cflags: -I${includedir}
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