Support targets at the root level in generate_gradle.py.

Previously targets like //:foo wouldn't work because an extra slash would
be inserted in front of the GradleSubdir.

Bug: 620034
Change-Id: I93abfb36ccb683b7c6308a8cbe14e870ea699e00
Reviewed-on: https://chromium-review.googlesource.com/800617
Reviewed-by: agrieve <agrieve@chromium.org>
Commit-Queue: Sami Kalliomäki <sakal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520585}
1 file changed