Add git_cl recipe module.

tests/git_cl_test.py

Index: tests/git_cl_test.py
diff --git a/tests/git_cl_test.py b/tests/git_cl_test.py
index 9b506fe20716af4b7314fbebf646783cf425bbea..e246379c97c3e3ee9b52e299a6a67eb8a6c3338b 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -21,7 +21,7 @@ import git_common
 import git_footers
 import subprocess2
 
-class ChangelistMock():
+class ChangelistMock(object):
   # A class variable so we can access it when we don't have access to the
   # instance that's being set.
   desc = ""
@@ -1434,11 +1434,11 @@ class TestGitCl(TestCase):
     self.mock(git_cl.sys, 'stdout', out)
 
     self.mock(git_cl, 'Changelist', ChangelistMock)
-    class TMP():
+    class StdinMock():
       def splitlines(self):
         return ['hihi']
 
-    self.mock(git_cl.sys, 'stdin', TMP())
+    self.mock(git_cl.sys, 'stdin', StdinMock())
 
     self.assertEqual(0, git_cl.main(['description', '-n', 'hihi']))
     self.assertEqual('hihi', ChangelistMock.desc)
@@ -1448,11 +1448,11 @@ class TestGitCl(TestCase):
     self.mock(git_cl.sys, 'stdout', out)
 
     self.mock(git_cl, 'Changelist', ChangelistMock)
-    class TMP():
+    class StdinMock(object):
       def splitlines(self):
         return ['hi', 'there']
 
-    self.mock(git_cl.sys, 'stdin', TMP())
+    self.mock(git_cl.sys, 'stdin', StdinMock())
 
     self.assertEqual(0, git_cl.main(['description', '-n', '-']))
     self.assertEqual('hi\nthere', ChangelistMock.desc)