Add a missing "import glob".

Reported in "[chromium-dev] the problem i met when buliding chromium on the windows 7 without cygwin"

R=scottmg@chromium.org

Review URL: https://codereview.chromium.org/134763002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244232 0039d316-1c4b-4281-b951-d872f2087c98

build/config/win/get_visual_studio_path.py

@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import errno
+import glob
 import os
 import re
 import subprocess