Preserve file context and ownership in policy store #136

Job	Run time
build (gcc, 3.12, 3.3)	1m 31s
build (gcc, 3.12, 3.3, test-flags-override)	1m 22s
build (gcc, 3.12, 3.3, test-debug)	1m 31s
build (gcc, 3.12, 3.3, linker-bfd)	1m 40s
build (gcc, 3.12, 3.3, linker-gold)	1m 32s
build (gcc, 3.11, 3.3)	1m 39s
build (gcc, 3.10, 3.3)	1m 46s
build (gcc, 3.9, 3.3)	1m 38s
build (gcc, 3.8, 3.3)	1m 45s
build (gcc, 3.7, 3.3)	1m 44s
build (gcc, pypy3.7, 3.3)	1m 58s
build (gcc, 3.12, 3.2)	1m 33s
build (gcc, 3.12, 3.1)	1m 45s
build (gcc, 3.12, 3.0)	1m 29s
build (gcc, 3.12, 2.7)	1m 49s
build (gcc, 3.12, 2.6)	1m 48s
build (gcc, 3.12, 2.5)	1m 42s
build (clang, 3.12, 3.3)	1m 45s
build (clang, 3.12, 3.3, test-flags-override)	1m 28s
build (clang, 3.12, 3.3, test-debug)	1m 24s
build (clang, 3.11, 3.3)	1m 37s
build (clang, 3.10, 3.3)	1m 37s
build (clang, 3.9, 3.3)	1m 49s
build (clang, 3.8, 3.3)	1m 51s
build (clang, 3.7, 3.3)	1m 53s
build (clang, pypy3.7, 3.3)	2m 9s
build (clang, 3.12, 3.2)	1m 38s
build (clang, 3.12, 3.1)	1m 38s
build (clang, 3.12, 3.0)	1m 40s
build (clang, 3.12, 2.7)	1m 52s
build (clang, 3.12, 2.6)	1m 57s
build (clang, 3.12, 2.5)	1m 45s
build (gcc, 3.12, 3.3, sanitizers)	2m 0s
	56m 15s

Provide feedback