Add some debug logging for win apache issues in run-webkit-tests.

R=eseidel@chromium.org
BUG=378444

Review URL: https://codereview.chromium.org/413063002

git-svn-id: svn://svn.chromium.org/blink/trunk@178801 bbb929c8-8fbe-4397-9dbb-9b2b20218538