/usr/share/pkgconfig/wayland-protocols.pc is in wayland-protocols 1.13-1.
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 | prefix=/usr
datarootdir=${prefix}/share
pkgdatadir=${pc_sysrootdir}${datarootdir}/wayland-protocols
Name: Wayland Protocols
Description: Wayland protocol files
Version: 1.13
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