cmd/go: only attempt to match subset of $GOCACHE in test

This test attempted to be clever by looking for the entirety of $GOCACHE
in the compile command line to ensure that the profile was coming from
cache.

Unfortunately, on Windows $GOCACHE contains \, which needs extra
escaping in a regexp. As an approximate alternative, just look for the
"gocache" component specified when defining GOCACHE.

This fixes the Windows longtest builders.

Cq-Include-Trybots: luci.golang.try:gotip-windows-amd64-longtest
Change-Id: If6c77cf066d8612431e0720405254e1fdf528e9b
Reviewed-on: https://go-review.googlesource.com/c/go/+/580137
Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Bypass: Michael Pratt <mpratt@google.com>
1 file changed
tree: 95789de07f9660c944923157de87bc588976e5f4
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. codereview.cfg
  11. CONTRIBUTING.md
  12. go.env
  13. LICENSE
  14. PATENTS
  15. README.md
  16. SECURITY.md
README.md

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