cmd/compile: do not inline functions marked cgo_unsafe_args
cmd/compile: do not inline functions marked cgo_unsafe_args

Now the net tests pass with -gcflags '-l=4'.

Fixes #18125.

Change-Id: I4e3a46eb0cb3a93b203e74f5bc99c5822331f535
Reviewed-on: https://go-review.googlesource.com/33722
Reviewed-by: Keith Randall <8c99c3a9284e493be632950b84cd789d08ed3e9d@golang.org>

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