Add missing imports.

Lib/test/test_gl.py

@@ -3,6 +3,7 @@
     taken mostly from the documentation.
     Roger E. Masse
 """
+import unittest
 from test.test_support import verbose, import_module
 import time
 gl = import_module('gl')

Lib/test/test_imageop.py

@@ -180,6 +180,7 @@ def getimage(name):
     """return a tuple consisting of
        image (in 'imgfile' format) width and height
     """
+    import imgfile
     try:
         sizes = imgfile.getsizes(name)
     except imgfile.error: