cmd/internal/obj/arm64: rewrite branches that are too far
cmd/internal/obj/arm64: rewrite branches that are too far

Fixes #12540.

Change-Id: I7893fdc023145b0aca4b4c7df7e08e47edcf5bba
Reviewed-on: https://go-review.googlesource.com/16902
Run-TryBot: Minux Ma <72d850dbd8858b791995463d8539b5a379577f28@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>

linux-on-ibm-z/go,ImJasonH/go,akutz/go,4ad/go,cloudflare/go,vsekhar/elastic-go,4ad/go,odeke-em/go,codestation/go,codestation/go,cyberroadie/go,miolini/go,golang/go,CAFxX/go,ImJasonH/go,Endika/go,Endika/go,theif519/go,odeke-em/go,cloudflare/go,ganboing/go-esx,roth1002/go,sndnvaps/go,fjballest/golang,fjballest/golang,josharian/go,akutz/go,polyverse-security/go,vanloswang/go,odeke-em/go,kim-racktop/go,kim-racktop/go,momchil-velikov/go,ganboing/go-esx,linux-on-ibm-z/go,akutz/go,derekmarcotte/go,theif519/go,nawawi/go,cloudflare/go,Endika/go,binarycrusader/go,suncycheng/go,sndnvaps/go,mwhudson/go,Jordanzuo/go,momchil-velikov/go,polyverse-security/go,4ad/go,derekmarcotte/go,CAFxX/go,Jordanzuo/go,Endika/go,derekmarcotte/go,ganboing/go-esx,sndnvaps/go,4ad/go,Endika/go,codestation/go,vsekhar/elastic-go,odeke-em/go,CAFxX/go,suncycheng/go,cyberroadie/go,josharian/go,Jordanzuo/go,nawawi/go,momchil-velikov/go,goodlang/good,cloudflare/go,golang/go,nawawi/go,binarycrusader/go,Cofyc/go,CAFxX/go,Cofyc/go,Samurais/go,binarycrusader/go,josharian/go,momchil-velikov/go,miolini/go,fjballest/golang,goodlang/good,binarycrusader/go,deft-code/go,fjballest/golang,theif519/go,miolini/go,Samurais/go,ImJasonH/go,vsekhar/elastic-go,goodlang/good,deft-code/go,4ad/go,derekmarcotte/go,miolini/go,theif519/go,theif519/go,goodlang/good,roth1002/go,deft-code/go,Samurais/go,christopher-henderson/Go,odeke-em/go,vanloswang/go,akutz/go,suncycheng/go,suncycheng/go,linux-on-ibm-z/go,mwhudson/go,mwhudson/go,miolini/go,roth1002/go,Jordanzuo/go,linux-on-ibm-z/go,derekmarcotte/go,fjballest/golang,cyberroadie/go,linux-on-ibm-z/go,sndnvaps/go,CAFxX/go,golang/go,cloudflare/go,polyverse-security/go,deft-code/go,akutz/go,nawawi/go,kim-racktop/go,vsekhar/elastic-go,golang/go,akutz/go,kim-racktop/go,theif519/go,cyberroadie/go,miolini/go,derekmarcotte/go,derekmarcotte/go,fjballest/golang,josharian/go,polyverse-security/go,binarycrusader/go,Samurais/go,vanloswang/go,sndnvaps/go,suncycheng/go,linux-on-ibm-z/go,vanloswang/go,golang/go,akutz/go,nawawi/go,kim-racktop/go,mwhudson/go,vanloswang/go,theif519/go,ganboing/go-esx,Jordanzuo/go,polyverse-security/go,fjballest/golang,ImJasonH/go,golang/go,josharian/go,codestation/go,Samurais/go,vsekhar/elastic-go,Cofyc/go,codestation/go,deft-code/go,vanloswang/go,CAFxX/go,kim-racktop/go,momchil-velikov/go,binarycrusader/go,Cofyc/go,cyberroadie/go,josharian/go,josharian/go,Endika/go,goodlang/good,vsekhar/elastic-go,mwhudson/go,miolini/go,mwhudson/go,Samurais/go,odeke-em/go,fjballest/golang,cloudflare/go,ganboing/go-esx,roth1002/go,momchil-velikov/go,4ad/go,linux-on-ibm-z/go,nawawi/go,CAFxX/go,golang/go,roth1002/go,josharian/go,momchil-velikov/go,Samurais/go,ImJasonH/go,ganboing/go-esx,roth1002/go,cyberroadie/go,ganboing/go-esx,ImJasonH/go,nawawi/go,Samurais/go,mwhudson/go,vsekhar/elastic-go,ImJasonH/go,deft-code/go,akutz/go,kim-racktop/go,suncycheng/go,binarycrusader/go,vsekhar/elastic-go,cyberroadie/go,vanloswang/go,miolini/go,vanloswang/go,codestation/go,Cofyc/go,polyverse-security/go,Cofyc/go,odeke-em/go,binarycrusader/go,suncycheng/go,sndnvaps/go,linux-on-ibm-z/go,deft-code/go,sndnvaps/go,kim-racktop/go,Jordanzuo/go,suncycheng/go,ImJasonH/go,Jordanzuo/go,polyverse-security/go,4ad/go,odeke-em/go,Cofyc/go,Cofyc/go,goodlang/good,cloudflare/go,roth1002/go,theif519/go,sndnvaps/go,CAFxX/go,derekmarcotte/go,Endika/go,nawawi/go,mwhudson/go,goodlang/good,4ad/go,polyverse-security/go,deft-code/go,cyberroadie/go,cloudflare/go,golang/go,momchil-velikov/go,codestation/go,goodlang/good,roth1002/go,Endika/go,Jordanzuo/go,codestation/go,ganboing/go-esx