Fix constructor arguments to OSError.

R=dpranke@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/6897034

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@82763 0039d316-1c4b-4281-b951-d872f2087c98

gclient_utils.py

@@ -32,7 +32,7 @@ class Error(Exception):
 class CheckCallError(OSError, Error):
   """CheckCall() returned non-0."""
   def __init__(self, command, cwd, returncode, stdout, stderr=None):
-    OSError.__init__(self, command, cwd, returncode, stdout, stderr)
+    OSError.__init__(self, command, cwd, returncode)
     Error.__init__(self, command)
     self.command = command
     self.cwd = cwd