libsepol: check scope permissions refer to valid class #576

Job	Run time
build (gcc, 3.12, 3.3)	1m 35s
build (gcc, 3.12, 3.3, test-flags-override)	1m 21s
build (gcc, 3.12, 3.3, test-debug)	1m 20s
build (gcc, 3.12, 3.3, linker-bfd)	1m 59s
build (gcc, 3.12, 3.3, linker-gold)	1m 34s
build (gcc, 3.11, 3.3)	1m 37s
build (gcc, 3.10, 3.3)	1m 53s
build (gcc, 3.9, 3.3)	1m 38s
build (gcc, 3.8, 3.3)	1m 39s
build (gcc, 3.7, 3.3)	2m 8s
build (gcc, pypy3.7, 3.3)	1m 56s
build (gcc, 3.12, 3.2)	1m 39s
build (gcc, 3.12, 3.1)	1m 32s
build (gcc, 3.12, 3.0)	1m 30s
build (gcc, 3.12, 2.7)	1m 50s
build (gcc, 3.12, 2.6)	1m 43s
build (gcc, 3.12, 2.5)	1m 55s
build (clang, 3.12, 3.3)	1m 37s
build (clang, 3.12, 3.3, test-flags-override)	1m 39s
build (clang, 3.12, 3.3, test-debug)	1m 35s
build (clang, 3.11, 3.3)	1m 38s
build (clang, 3.10, 3.3)	1m 41s
build (clang, 3.9, 3.3)	1m 50s
build (clang, 3.8, 3.3)	1m 47s
build (clang, 3.7, 3.3)	1m 57s
build (clang, pypy3.7, 3.3)	2m 10s
build (clang, 3.12, 3.2)	1m 42s
build (clang, 3.12, 3.1)	1m 41s
build (clang, 3.12, 3.0)	1m 41s
build (clang, 3.12, 2.7)	2m 31s
build (clang, 3.12, 2.6)	1m 46s
build (clang, 3.12, 2.5)	1m 50s
build (gcc, 3.12, 3.3, sanitizers)	2m 1s
	57m 55s

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