cmd/dist: say 'go test .' instead of 'go test' in a few places for cleaner output
cmd/dist: say 'go test .' instead of 'go test' in a few places for cleaner output

This just makes all.bash a bit less chatty.

Change-Id: I7d2ecabf0c7d8df2065d7052718f611bb2907801
Reviewed-on: https://go-review.googlesource.com/c/go/+/177418
Run-TryBot: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

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