add an explicit github ssh remote

Change-Id: I365727c9e32930d759e32c11456bc759630058ff
diff --git a/default.xml b/default.xml
index 3ef37e5..8738cbe 100644
--- a/default.xml
+++ b/default.xml
@@ -8,6 +8,9 @@
            fetch=".."
            review="review.cyanogenmod.com" />
 
+   <remote  name="private"
+            fetch="git@github.com:" />
+
   <default revision="refs/heads/ics"
            remote="github"
            sync-j="4" />