default.xml: cm: Update to 6.0.1_r30

Change-Id: Icad5f9661507224362d291e6dcdb6fc5f02afde0
diff --git a/default.xml b/default.xml
index c9b02f3..034a1da 100644
--- a/default.xml
+++ b/default.xml
@@ -4,7 +4,7 @@
   <remote  name="aosp"
            fetch="https://android.googlesource.com"
            review="android-review.googlesource.com"
-           revision="refs/tags/android-6.0.1_r24" />
+           revision="refs/tags/android-6.0.1_r30" />
 
   <remote  name="github"
            fetch=".."