/usr/lib/x86_64-linux-gnu/pkgconfig/krb5.pc is in heimdal-dev 7.5.0+dfsg-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 9 10 | prefix=/usr
exec_prefix=/usr
libdir=/usr/lib/x86_64-linux-gnu/heimdal
includedir=/usr/include/heimdal
vendor=Heimdal
Name: krb5
Description: Heimdal implementation of the kerberos network authentication.
Version: 7.5.0
Requires: heimdal-krb5
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