download linuxkit instead of building, as it is a basic tool #71

Job	Run time
get-run-id	0s
test_suite_tag	0s
test_suite_master / Determine best available runner	1s
test_suite_pr	0s
test_suite_master / Networking test suite	1h 32m 27s
test_suite_master / EVE upgrade test suite (ext4)	1h 11m 4s
test_suite_master / Storage test suite (ext4)	55m 13s
test_suite_master / EVE upgrade test suite (zfs)	1h 0m 43s
test_suite_master / LPS LOC test suite	22m 25s
test_suite_master / Storage test suite (zfs)	1h 3m 0s
test_suite_master / Smoke tests (ext4, true)	59m 33s
test_suite_master / Smoke tests (ext4, false)	56m 22s
test_suite_master / Smoke tests (zfs, true)	1h 15m 50s
test_suite_master / User apps test suite	1h 16m 39s
test_suite_master / Virtualization test suite	22m 24s
test_suite_master / Smoke tests (zfs, false)	1h 5m 35s
	12h 1m 16s

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