go/build: move math/bits into L1 set of dependencies
go/build: move math/bits into L1 set of dependencies

Per suggestion from rsc.

Change-Id: I4b61ec6f35ffaaa792b75e011fbba1bdfbabc1f6
Reviewed-on: https://go-review.googlesource.com/37501
Run-TryBot: Robert Griesemer <a6752097faebf1f02d80107d77a9be009089afe3@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

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