libselinux: support file_contexts.bin without file_contexts

Change the label_file backend in libselinux to support systems
that only have file_contexts.bin files installed and do not ship
a file_contexts file at all.  Only fail if neither file can be
loaded.

Change-Id: I15660f4b3e4c5cb8ae0ec1498c74d6fcbb9a0400
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
1 file changed