libsepol: validate common classes have at least one permissions #524

Job	Run time
build (gcc, 3.11, 3.1)	1m 34s
build (gcc, 3.11, 3.1, test-flags-override)	1m 21s
build (gcc, 3.11, 3.1, test-debug)	1m 28s
build (gcc, 3.11, 3.1, linker-bfd)	1m 30s
build (gcc, 3.11, 3.1, linker-gold)	1m 49s
build (gcc, 3.10, 3.1)	1m 31s
build (gcc, 3.9, 3.1)	1m 33s
build (gcc, 3.8, 3.1)	1m 33s
build (gcc, 3.7, 3.1)	2m 41s
build (gcc, pypy3.7, 3.1)	1m 54s
build (gcc, 3.11, 3.0)	1m 31s
build (gcc, 3.11, 2.7)	1m 45s
build (gcc, 3.11, 2.6)	1m 48s
build (gcc, 3.11, 2.5)	1m 41s
build (clang, 3.11, 3.1)	1m 42s
build (clang, 3.11, 3.1, test-flags-override)	1m 26s
build (clang, 3.11, 3.1, test-debug)	1m 36s
build (clang, 3.10, 3.1)	1m 36s
build (clang, 3.9, 3.1)	1m 45s
build (clang, 3.8, 3.1)	1m 44s
build (clang, 3.7, 3.1)	1m 48s
build (clang, pypy3.7, 3.1)	2m 7s
build (clang, 3.11, 3.0)	1m 39s
build (clang, 3.11, 2.7)	1m 58s
build (clang, 3.11, 2.6)	1m 53s
build (clang, 3.11, 2.5)	1m 53s
build (gcc, 3.11, 3.1, sanitizers)	2m 15s
	47m 1s

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