runtests.py: support extra args in loadTestsFromModule
runtests.py: support extra args in loadTestsFromModule

Seems like extra args/kw can be specified in Python 3.

nodakai/watchman,facebook/watchman,kwlzn/watchman,wez/watchman,facebook/watchman,wez/watchman,facebook/watchman,kwlzn/watchman,facebook/watchman,kwlzn/watchman,nodakai/watchman,nodakai/watchman,facebook/watchman,facebook/watchman,dhruvsinghal/watchman,facebook/watchman,dhruvsinghal/watchman,kwlzn/watchman,dhruvsinghal/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,dhruvsinghal/watchman,nodakai/watchman,dhruvsinghal/watchman,kwlzn/watchman,wez/watchman,kwlzn/watchman,wez/watchman,wez/watchman,nodakai/watchman,dhruvsinghal/watchman,wez/watchman,wez/watchman,nodakai/watchman,nodakai/watchman,dhruvsinghal/watchman,dhruvsinghal/watchman,wez/watchman,kwlzn/watchman,facebook/watchman,wez/watchman