Manifest for Android O IOT Preview 8 (4718959)

Change-Id: I571c913b0bb1e562b6d9af57054d8daff3cbbc1e
diff --git a/default.xml b/default.xml
index 76cb05a..8580b4b 100644
--- a/default.xml
+++ b/default.xml
@@ -4,7 +4,7 @@
   <remote  name="aosp"
            fetch=".."
            review="https://android-review.googlesource.com/" />
-  <default revision="o-mr1-iot-preview-8"
+  <default revision="refs/tags/android-o-mr1-iot-preview-8"
            remote="aosp"
            sync-j="4" />