cmd/cgo: create -objdir if not exist

Currently the directory is created only if -objdir is omited.
Creating the directory here is useful to avoid doing this in each build system.
And also this is consistent with similar flags of other tools like `-o`.

Change-Id: Ic39d6eb3e003bc4884089f80f790e30df4a54b01
Reviewed-on: https://go-review.googlesource.com/c/go/+/576815
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
1 file changed
tree: 6a2ffff81692a37a17b219774f2a6f473beff57c
  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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