cmd/compile: temporarily disable Formats test
cmd/compile: temporarily disable Formats test

So we can submit a sequence of older changes that don't yet
update the formats in this file. We will then re-enable the
test with the updated formats.

Change-Id: I6ed559b83adc891bbf4b3d855a7dc1e428366f7f
Reviewed-on: https://go-review.googlesource.com/28776
Reviewed-by: Matthew Dempsky <e56ac2c500064424afac424d4b5e53bd0570a731@google.com>

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