Run tests when policy_test_cases.json changes

BUG=498579

Change-Id: I0ef207bbcf210de686902b2248f4e0c96453b707
Reviewed-on: https://chromium-review.googlesource.com/c/1365236
Commit-Queue: Andreea-Elena Costinas <acostinas@google.com>
Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614354}
2 files changed