report_stages: Fix invocation of som_alerts_dispatcher

BUG=None
TEST=report_stages_unittest

Change-Id: Iaacb5c8eeb462cfdbe25ec5cc25701f6766e9993
Reviewed-on: https://chromium-review.googlesource.com/465506
Commit-Ready: David Riley <davidriley@chromium.org>
Tested-by: David Riley <davidriley@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
1 file changed