Add mac toolchain script support to find_sdk script.

`buildbot_chrome_nacl_stage.py` calls directly into find_sdk.py, add support for
mac toolchain there.

BUG=474373
TBR=thakis@chromium.org

Review URL: https://codereview.chromium.org/1840323002

Cr-Commit-Position: refs/heads/master@{#384110}


CrOS-Libchrome-Original-Commit: e47e4cb728589eced95417914a35b84a0f724e22
1 file changed
tree: 2fc4474f3c9a1750c490525f5a7b2099dce72993
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/