sepolicy: do not fail when file_contexts.local does not exist

When running "sepolicy manpage" on a system without file_contexts.local,
the command fails with:

    FileNotFoundError: [Errno 2] No such file or directory:
    '//etc/selinux/refpolicy/contexts/files/file_contexts.local'

Verify that the file exists before using it.

Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
1 file changed