MFC r292650,r292651:

MFC r292650,r292651:

r292650:

Move mac_bsdextended check up before running the test_libugidfw_strings testcases

I realize that these tests could be run before mac_bsdextended is loaded, but
it would overcomplicate things to special case handle the testcases before doing
the mac_bsdextended(4) feature check

The testcases will be split up so they can be run separately in the near future

r292651:

Delete the comment about running `test_libugidfw_strings` before testing
`mac_is_present` so it doesn't accidentally confuse people

git-svn-id: svn://svn.freebsd.org/base/stable/10@293257 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f