Add some suppressions for generated visual studio files to .gitignore.
Add some suppressions for generated visual studio files to .gitignore.

R=scottmg@chromium.org, thakis@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/22825022

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@156889 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs