fix windows path normalization in this test
fix windows path normalization in this test

Summary: there's some capitalization in my new windows VM and it was breaking this test :-/

Reviewed By: sid0

Differential Revision: D3921554

fbshipit-source-id: a4e8023bfbb94c7f5e992c5fbc2fee7e119b23f2

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