Inject pylib first in the path. This ensures that test load the version

gyp_main.py

Index: gyp_main.py
diff --git a/gyp_main.py b/gyp_main.py
index 4ec872f0f95aa3840967f8951e7e6448477e7d64..25a6eba94aae7d09d93d04f129e54c103255f088 100755
--- a/gyp_main.py
+++ b/gyp_main.py
@@ -4,15 +4,13 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import os
 import sys
 
-# TODO(mark): sys.path manipulation is some temporary testing stuff.
-try:
-  import gyp
-except ImportError, e:
-  import os.path
-  sys.path.append(os.path.join(os.path.dirname(sys.argv[0]), 'pylib'))
-  import gyp
+# Make sure we're using the version of pylib in this repo, not one installed
+# elsewhere on the system.
+sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), 'pylib'))
+import gyp
 
 if __name__ == '__main__':
   sys.exit(gyp.script_main())