Add sys.path to include chromite

BUG=chromium-os:37911
TEST=Run generate_test_report.py, it prints help information

Change-Id: Ia02a792d6fb49527aeb6cc62577b939a64008ff4
Reviewed-on: https://gerrit.chromium.org/gerrit/42070
Reviewed-by: Chris Sosa <sosa@chromium.org>
Commit-Queue: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
1 file changed