[chromium] Unreviewed, update .gitignore to handle VS2010 files.

[chromium] Unreviewed, update .gitignore to handle VS2010 files.

Source/JavaScriptCore:

* JavaScriptCore.gyp/.gitignore:

Source/Platform:

* Platform.gyp/.gitignore:

Source/ThirdParty:

* glu/.gitignore:

Source/WebCore:

* WebCore.gyp/.gitignore:

Source/WebKit/chromium:

* .gitignore:

Source/WTF:

* WTF.gyp/.gitignore:

Tools:

* .gitignore:
* DumpRenderTree/DumpRenderTree.gyp/.gitignore:
* TestWebKitAPI/TestWebKitAPI.gyp/.gitignore:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@121801 268f45cc-cd09-0410-ab3c-d52691b4dbfc