Switch to a relative fetch URI

Change-Id: Iaf9ba7f9da670f8cd2e6416d676f18357d2f0af0
diff --git a/default.xml b/default.xml
index e98af30..48e89da 100644
--- a/default.xml
+++ b/default.xml
@@ -2,7 +2,7 @@
 <manifest>
 
   <remote  name="aosp"
-           fetch="https://android.googlesource.com/" />
+           fetch=".." />
   <default revision="gingerbread"
            remote="aosp"
            sync-j="4" />