Fix unknown option '-msse2' warning on Windows.

Analogous to:
https://webrtc-codereview.appspot.com/43169004/

R=tmoniuszko@opera.com

Review URL: https://webrtc-codereview.appspot.com/49169004

Patch from Tomasz Moniuszko <tmoniuszko@opera.com>.
2 files changed
tree: ec33e219b28fc4ac29f162c93a911f3b0c5607a6
  1. LICENSE
  2. OWNERS
  3. README.chromium
  4. codereview.settings
  5. dl/