testsuite: Mark keep-cafs and keep-cafs-fail as broken on FreeBSD
testsuite: Mark keep-cafs and keep-cafs-fail as broken on FreeBSD

See #16035.

sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc