[autotest] Add push_to_prod suite to auto_filed bug suite list.

push_to_prod is used to test for push to prod, which including bug
filing test.

BUG=chromium:534465
TEST=unittest.

Change-Id: I8383458ea6c2ae578209c66299ff537caaf2c6ce
Reviewed-on: https://chromium-review.googlesource.com/301440
Commit-Ready: Shuqian Zhao <shuqianz@chromium.org>
Tested-by: Shuqian Zhao <shuqianz@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
1 file changed