5.1.1_r3 -> 5.1.1_r6

Change-Id: Ifc444a85ecbe76e5c7c11d9354285a399193739b
diff --git a/default.xml b/default.xml
index a986f23..a2eac45 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-5.1.1_r3" />
+           revision="refs/tags/android-5.1.1_r6" />
 
   <remote  name="github"
            fetch=".."