Bug 1231981 - Part 6: Make sure we have pywin32 in the virtualenv for mochitest. r=gps

MozReview-Commit-ID: GEAAnagEqvh

--HG--
extra : rebase_source : 6cb8510bbd175b9ca703aba72c3ee9adf461cf9a

testing/mozharness/configs/unittests/win_unittest.py

@@ -26,6 +26,8 @@ config = {
     "xpcshell_name": XPCSHELL_NAME,
     "virtualenv_path": 'venv',
     "virtualenv_python_dll": os.path.join(os.path.dirname(sys.executable), "python27.dll"),
+    "virtualenv_modules": ['pywin32'],
+
     "find_links": [
         "http://pypi.pvt.build.mozilla.org/pub",
         "http://pypi.pub.build.mozilla.org/pub",