deploy_cipd: block this script from running in master branch

This will prevent any accidental pushing of the stale code

BUG=None
TEST=None

Change-Id: I761ab0fe180a81d89bba2f63e0940c975f240176
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/go/+/2706258
Reviewed-by: Jack Neus <jackneus@google.com>
Commit-Queue: Sean Abraham <seanabraham@chromium.org>
Tested-by: Sean Abraham <seanabraham@chromium.org>
1 file changed