build/common.gypi: split out filename exclude rules

Here's a step towards making this enormous file a little more tractable.


Review URL: http://codereview.chromium.org/9288078

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@119372 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed