cmd/dist: enable race detector test on Linux/ARM64
cmd/dist: enable race detector test on Linux/ARM64

CL 138675 added the race detector support on Linux/ARM64, but it
didn't enable the race detector tests in cmd/dist (therefore in
all.bash). Enable them.

Updates #28848

Change-Id: I4306dad2fb4167021d568436076b9f535d7f6e07
Reviewed-on: https://go-review.googlesource.com/c/149967
Run-TryBot: Cherry Zhang <d62e63aa42ce272d7b6a5055d97e942b33a34679@google.com>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

akutz/go,cloudflare/go,cloudflare/go,akutz/go,CAFxX/go,akutz/go,CAFxX/go,nawawi/go,akutz/go,golang/go,cloudflare/go,cloudflare/go,nawawi/go,akutz/go,josharian/go,akutz/go,golang/go,golang/go,cloudflare/go,nawawi/go,josharian/go,josharian/go,CAFxX/go,golang/go,akutz/go,golang/go,josharian/go,cloudflare/go,nawawi/go,golang/go,CAFxX/go,nawawi/go,golang/go,nawawi/go,CAFxX/go,cloudflare/go,golang/go,nawawi/go,josharian/go,akutz/go,CAFxX/go,josharian/go,josharian/go,CAFxX/go,nawawi/go,cloudflare/go,josharian/go,CAFxX/go