libselinux: Add support for pcre2 to pkgconfig definition

When libselinux is built using USE_PCRE2 libselinux.pc needs to require
libpcre2-8 instead of libpcre.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1487521

Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
3 files changed