cmd/dist: make test names consistent
cmd/dist: make test names consistent

Current banners are:

##### Building Go bootstrap tool.
##### Building Go toolchain using /Users/josh/go/1.4.
##### Building go_bootstrap for host, darwin/amd64.
##### Building packages and commands for darwin/amd64.
##### Testing packages.
##### GOMAXPROCS=2 runtime -cpu=1,2,4
##### Testing without libgcc.
##### sync -cpu=10
##### ../misc/cgo/stdio
##### ../misc/cgo/life
##### ../misc/cgo/fortran
##### ../misc/cgo/test
##### Testing race detector
##### ../misc/cgo/testso
##### ../misc/cgo/testsovar
##### misc/cgo/testcarchive
##### ../misc/cgo/testcshared
##### ../misc/cgo/errors
##### ../test/bench/go1
##### ../test
##### API check

One of these things is not like the others.
Fix that.

Change-Id: If0bd8ea9293d73b5d1b70d6bf676bd9192991505
Reviewed-on: https://go-review.googlesource.com/26759
Run-TryBot: Josh Bleecher Snyder <cdc248cc4d32e4fbfe04e45228163bcecd48a0b9@gmail.com>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

momchil-velikov/go,polyverse-security/go,momchil-velikov/go,CAFxX/go,vsekhar/elastic-go,golang/go,nawawi/go,suncycheng/go,derekmarcotte/go,golang/go,nawawi/go,polyverse-security/go,cloudflare/go,goodlang/good,akutz/go,momchil-velikov/go,cloudflare/go,golang/go,josharian/go,josharian/go,vsekhar/elastic-go,ImJasonH/go,goodlang/good,akutz/go,christopher-henderson/Go,momchil-velikov/go,codestation/go,CAFxX/go,Cofyc/go,polyverse-security/go,goodlang/good,nawawi/go,ImJasonH/go,polyverse-security/go,suncycheng/go,ImJasonH/go,derekmarcotte/go,codestation/go,cloudflare/go,codestation/go,suncycheng/go,linux-on-ibm-z/go,ImJasonH/go,akutz/go,vsekhar/elastic-go,derekmarcotte/go,suncycheng/go,vsekhar/elastic-go,codestation/go,derekmarcotte/go,Cofyc/go,linux-on-ibm-z/go,vsekhar/elastic-go,codestation/go,akutz/go,codestation/go,CAFxX/go,akutz/go,momchil-velikov/go,suncycheng/go,ImJasonH/go,Cofyc/go,Cofyc/go,Cofyc/go,CAFxX/go,linux-on-ibm-z/go,goodlang/good,nawawi/go,polyverse-security/go,suncycheng/go,suncycheng/go,akutz/go,goodlang/good,akutz/go,derekmarcotte/go,josharian/go,Cofyc/go,codestation/go,Cofyc/go,linux-on-ibm-z/go,derekmarcotte/go,josharian/go,momchil-velikov/go,cloudflare/go,momchil-velikov/go,CAFxX/go,josharian/go,Cofyc/go,vsekhar/elastic-go,polyverse-security/go,vsekhar/elastic-go,cloudflare/go,cloudflare/go,josharian/go,goodlang/good,suncycheng/go,cloudflare/go,CAFxX/go,derekmarcotte/go,nawawi/go,golang/go,nawawi/go,cloudflare/go,ImJasonH/go,josharian/go,momchil-velikov/go,polyverse-security/go,polyverse-security/go,nawawi/go,CAFxX/go,ImJasonH/go,derekmarcotte/go,goodlang/good,CAFxX/go,linux-on-ibm-z/go,josharian/go,linux-on-ibm-z/go,golang/go,akutz/go,goodlang/good,vsekhar/elastic-go,golang/go,golang/go,linux-on-ibm-z/go,codestation/go,ImJasonH/go,golang/go,nawawi/go,linux-on-ibm-z/go