tree 6e214b207326cb168dcaf7299b08ea81485d37a4
parent 6efe88ba95ee2b4bab6009321c7aab6c36d7b03a
author Ying Wang <wangying@google.com> 1456898725 -0800
committer Ying Wang <wangying@google.com> 1456945199 -0800

Clean generated source dir if .proto/.rs is gonee.

Similar to how we clean the generated source dir if .aidl becomes
obsolete.

Bug: 26688474
Change-Id: I66c5b6d6513259b5f4f4bac84f384f4bf953d82a
(cherry-pick from commit d5ffec938344defd437d8e315d6a3376b1100a5a)