5.1.1_r1 -> 5.1.1_r2

Change-Id: If7458d038f0300612b8a1f0126153a6609405510
diff --git a/default.xml b/default.xml
index 4892f47..aa7645c 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_r1" />
+           revision="refs/tags/android-5.1.1_r2" />
 
   <remote  name="github"
            fetch=".."