runtime/race: update reference to compiler-rt sources
runtime/race: update reference to compiler-rt sources

Change-Id: Iabe46677f24fef6e482a4beca774dbfc553026a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/217778
Reviewed-by: Dmitry Vyukov <05e8181be3150e47da8fe2e1f18d381c75496ff4@google.com>

nawawi/go,nawawi/go,nawawi/go,akutz/go,golang/go,CAFxX/go,akutz/go,akutz/go,nawawi/go,golang/go,cloudflare/go,CAFxX/go,nawawi/go,cloudflare/go,nawawi/go,cloudflare/go,cloudflare/go,golang/go,CAFxX/go,CAFxX/go,akutz/go,golang/go,nawawi/go,nawawi/go,CAFxX/go,golang/go,golang/go,akutz/go,CAFxX/go,cloudflare/go,akutz/go,cloudflare/go,golang/go,cloudflare/go,cloudflare/go,golang/go,akutz/go,CAFxX/go,CAFxX/go,akutz/go