linux

Add is_{system|share}_install methods #390

Job	Run time
perl (1, 5.39)	1m 33s
perl (1, ALIEN_BUILD_LIVE_TEST=1, 5.38-alpine3.16)	1m 47s
perl (1, ALIEN_BUILD_LIVE_TEST=1, 5.38-bionic)	1m 48s
perl (1, ALIEN_BUILD_LIVE_TEST=1, 5.38-fedora36)	2m 19s
perl (0, ALIEN_BUILD_LIVE_TEST=0, 5.38-bullseye)	1m 32s
perl (1, ALIEN_BUILD_LIVE_TEST=1, 5.38-bullseye)	2m 27s
perl (1, ALIEN_DOWNLOAD_RULE=warn, 5.38)	1m 35s
perl (1, ALIEN_DOWNLOAD_RULE=digest, 5.38)	1m 35s
perl (1, ALIEN_DOWNLOAD_RULE=encrypt, 5.38)	1m 42s
perl (1, ALIEN_DOWNLOAD_RULE=digest_or_encrypt, 5.38)	1m 39s
perl (1, ALIEN_DOWNLOAD_RULE=digest_and_encrypt, 5.38)	1m 42s
perl (1, 5.38)	1m 39s
perl (1, 5.36)	1m 36s
perl (1, 5.34)	1m 35s
perl (1, 5.32)	1m 35s
perl (1, 5.30)	1m 38s
perl (1, 5.28)	1m 34s
perl (1, 5.26)	1m 38s
perl (1, 5.24)	1m 35s
perl (1, 5.22)	1m 38s
perl (1, 5.20)	1m 32s
perl (0, 5.18)	1m 25s
perl (0, 5.16)	1m 28s
perl (0, 5.14)	1m 20s
perl (0, 5.12)	1m 20s
perl (0, 5.10.1)	1m 5s
perl (0, 5.10.0)	59s
perl (0, 5.8.8)	59s
perl (0, 5.8.4)	1m 3s
	45m 18s

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