runtime: fix newextram PC passed to race detector
runtime: fix newextram PC passed to race detector

PC passed to racegostart is expected to be a return PC
of the go statement. Race runtime will subtract 1 from the PC
before symbolization. Passing start PC of a function is wrong.
Add sys.PCQuantum to the function start PC.

Update #17190

Change-Id: Ia504c49e79af84ed4ea360c2aea472b370ea8bf5
Reviewed-on: https://go-review.googlesource.com/29712
Run-TryBot: Dmitry Vyukov <05e8181be3150e47da8fe2e1f18d381c75496ff4@google.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

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