Merge pull request #701 from JuliaLang/sk/macos-uname-lies #590

Job	Run time
test-juliaup (x86_64-pc-windows-msvc)	8m 21s
test-juliaup (x86_64-pc-windows-gnu)	9m 23s
test-juliaup (x86_64-apple-darwin)	8m 58s
test-juliaup (x86_64-unknown-linux-gnu)	4m 36s
test-juliaup (x86_64-unknown-linux-musl)	6m 59s
test-juliaup (i686-pc-windows-msvc)	9m 21s
test-juliaup (i686-pc-windows-gnu)	9m 20s
check-juliaup (x86_64-pc-windows-msvc-windowsstore)	3m 24s
check-juliaup (x86_64-pc-windows-msvc-windowsappinstaller)	2m 53s
check-juliaup (x86_64-pc-windows-gnu-msi)	3m 28s
check-juliaup (x86_64-pc-windows-gnu-msi)	3m 29s
check-juliaup (x86_64-apple-darwin)	1m 44s
check-juliaup (x86_64-unknown-linux-gnu)	2m 34s
check-juliaup (x86_64-unknown-linux-musl)	2m 39s
check-juliaup (i686-pc-windows-msvc-windowsstore)	3m 1s
check-juliaup (i686-pc-windows-msvc-windowsappinstaller)	3m 24s
check-juliaup (i686-pc-windows-gnu-msi)	3m 14s
check-juliaup (i686-unknown-linux-gnu)	2m 24s
check-juliaup (i686-unknown-linux-musl)	3m 7s
check-juliaup (aarch64-unknown-linux-gnu)	2m 46s
check-juliaup (aarch64-unknown-linux-musl)	3m 34s
check-juliaup (aarch64-apple-darwin)	2m 11s
	1h 40m 50s

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