manifest: update to r30

Change-Id: Iec585d713ff4a346268f572b32cfe441e34fccdc
diff --git a/default.xml b/default.xml
index b6a1603..51f3c92 100644
--- a/default.xml
+++ b/default.xml
@@ -21,7 +21,7 @@
   <remote  name="private"
            fetch="ssh://git@github.com" />
 
-  <default revision="refs/tags/android-6.0.1_r24"
+  <default revision="refs/tags/android-6.0.1_r30"
            remote="aosp"
            sync-j="4" />