cmd/compile: aggregate bit-test rules
cmd/compile: aggregate bit-test rules

No functional changes.

Change-Id: I4ea186b09a0309dfa1a80ff71208af2223997ffe
Reviewed-on: https://go-review.googlesource.com/94762
Reviewed-by: Keith Randall <8c99c3a9284e493be632950b84cd789d08ed3e9d@golang.org>

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