/usr/lib/pkgconfig/capstone.pc is in libcapstone-dev 2.1.2-2.1.
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 | Name: capstone
Description: Capstone disassembly engine
Version: 2.1.2
libdir=/usr/lib
includedir=/usr/include/capstone
archive=${libdir}/libcapstone.a
Libs: -L${libdir} -lcapstone
Cflags: -I${includedir}
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