Manifest for Android 8.1.0 Release 6 (OPM1.171019.015)

Change-Id: I52210033e0001834553ce908490a9f343e75c9a5
diff --git a/default.xml b/default.xml
index 8a06797..4fb93b3 100644
--- a/default.xml
+++ b/default.xml
@@ -4,7 +4,7 @@
   <remote  name="aosp"
            fetch=".."
            review="https://android-review.googlesource.com/" />
-  <default revision="refs/tags/android-8.1.0_r5"
+  <default revision="refs/tags/android-8.1.0_r6"
            remote="aosp"
            sync-j="4" />