cmd/go: pass resolved CC, GCCGO to cgo

This makes sure the go command and cgo agree about
exactly which compiler is being used.

This issue was reported by RyotaK.

Fixes CVE-2021-3115
Fixes #43783

Change-Id: If171c5c8b2523efb5ea2d957e5ad1380a038149c
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/949416
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/284780
Run-TryBot: Roland Shoemaker <roland@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Roland Shoemaker <roland@golang.org>
2 files changed
tree: b5bba66dc47d931164ca7b4a780ec1eb77f94d88
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. CONTRIBUTING.md
  12. CONTRIBUTORS
  13. favicon.ico
  14. LICENSE
  15. PATENTS
  16. README.md
  17. robots.txt
  18. SECURITY.md
README.md

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