libselinux: compare absolute pathname in matchpathcon -V

filepath needs to be resolved first in order to be correctly found by
selabel_lookup_raw()

Fixes:
$ matchpathcon -V passwd
passwd has context system_u:object_r:passwd_file_t:s0, should be
system_u:object_r:passwd_file_t:s0

$ echo $?
1

Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
1 file changed