Fix the .ycm_extra_conf.py and SublimeText documentation.

There were a few broken links in the documentation and the provided
YCM template would not load properly in Sublime Text 3 on windows.

Lastly make the unit presubmit test pass on Windows too.

BUG=NONE
TEST=chromium.ycm_extra_conf_unittest.py

Review-Url: https://codereview.chromium.org/2039923002
Cr-Original-Commit-Position: refs/heads/master@{#398330}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 7e3be85fc10b1d0f44c5e7f5f87382aa39e9469b
2 files changed