Insert note about required CLA.

GettingStarted.wiki

diff --git a/GettingStarted.wiki b/GettingStarted.wiki
index a5de505..e7fe165 100644
--- a/GettingStarted.wiki
+++ b/GettingStarted.wiki
@@ -218,6 +218,12 @@
 
 There are a number of ways that you can contribute to the Melange project.
 
+== CLA ==
+
+You must sign the Google CLA before we can accept any patches from you.
+
+Please visit: [https://cla.developers.google.com/]
+
 == Discussion ==
 
 If you are interested in contributing to the Melange project, please join our