cmd/link: add -asan option

The -asan option causes the linker to link against the runtime/asan
package in order to use the C/C++ address sanitizer.

This CL passes tests but is not usable by itself.  The actual
runtime/asan package, and support for -asan in the go tool and the
compiler, and tests, are in separate CLs.

Updates #44853.

Change-Id: Ifc6046c1f75ba52777cbb3d937a4b66e91d5798d
Reviewed-on: https://go-review.googlesource.com/c/go/+/298610
Trust: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
4 files changed
tree: 1108f5faf92c4b925bcfc4d5ccc409f0918adc9d
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. codereview.cfg
  12. CONTRIBUTING.md
  13. CONTRIBUTORS
  14. LICENSE
  15. PATENTS
  16. README.md
  17. SECURITY.md
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