cmd/go: skip slow tests on mips when run under builders
cmd/go: skip slow tests on mips when run under builders

Change-Id: If754de6c44cf0ec4192101432e4065cc7a28e862
Reviewed-on: https://go-review.googlesource.com/33425
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

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