Add more directories to export_tarball.py's exclude list.

Recently the tarball got approx. 2x bigger because of that.

TBR=nsylvain

TEST=none
BUG=29044

Review URL: http://codereview.chromium.org/1545036

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@44458 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed