checkpolicy: support CIDR notation for nodecon statements #452

Job	Run time
build (gcc, 3.12, 3.3)	1m 47s
build (gcc, 3.12, 3.3, test-flags-override)	1m 23s
build (gcc, 3.12, 3.3, test-debug)	1m 36s
build (gcc, 3.12, 3.3, linker-bfd)	1m 47s
build (gcc, 3.12, 3.3, linker-gold)	1m 38s
build (gcc, 3.11, 3.3)	1m 50s
build (gcc, 3.10, 3.3)	1m 30s
build (gcc, 3.9, 3.3)	1m 36s
build (gcc, 3.8, 3.3)	1m 38s
build (gcc, 3.7, 3.3)	1m 39s
build (gcc, pypy3.7, 3.3)	2m 6s
build (gcc, 3.12, 3.2)	1m 34s
build (gcc, 3.12, 3.1)	1m 38s
build (gcc, 3.12, 3.0)	1m 52s
build (gcc, 3.12, 2.7)	1m 45s
build (gcc, 3.12, 2.6)	1m 48s
build (gcc, 3.12, 2.5)	1m 45s
build (clang, 3.12, 3.3)	1m 46s
build (clang, 3.12, 3.3, test-flags-override)	1m 46s
build (clang, 3.12, 3.3, test-debug)	1m 33s
build (clang, 3.11, 3.3)	1m 38s
build (clang, 3.10, 3.3)	1m 54s
build (clang, 3.9, 3.3)	1m 44s
build (clang, 3.8, 3.3)	1m 42s
build (clang, 3.7, 3.3)	1m 45s
build (clang, pypy3.7, 3.3)	2m 3s
build (clang, 3.12, 3.2)	1m 42s
build (clang, 3.12, 3.1)	2m 0s
build (clang, 3.12, 3.0)	1m 46s
build (clang, 3.12, 2.7)	1m 49s
build (clang, 3.12, 2.6)	2m 7s
build (clang, 3.12, 2.5)	1m 51s
build (gcc, 3.12, 3.3, sanitizers)	2m 6s
	58m 4s

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