Add windows ignores to .gitignore, mostly useful for cygwin users

TEST=none
BUG=none

Review URL: http://codereview.chromium.org/557082

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@37710 0039d316-1c4b-4281-b951-d872f2087c98

.gitignore

@@ -1,3 +1,10 @@
-git-cl-repo
-tests/pymox
 *.pyc
+/git-cl-repo
+/tests/pymox
+/python
+/python.bat
+/python_bin
+/svn
+/svn.bat
+/svn_bin
+/svnversion.bat