Fix to path search redux.

TBR=agable@chromium.org,hinoka@chromium.org
BUG=

Review URL: https://codereview.chromium.org/232093002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@262832 0039d316-1c4b-4281-b951-d872f2087c98

git_cache.py

@@ -158,7 +158,7 @@ class Mirror(object):
       if sys.platform.startswith('win'):
         for suffix in ('.bat', '.cmd', '.exe'):
           alt_target = target + suffix
-          if os.path.isfile(alt_target) and os.access(target, os.X_OK):
+          if os.path.isfile(alt_target) and os.access(alt_target, os.X_OK):
             return alt_target
     return None