Manifest for ndk-r16-beta1

Change-Id: I417b2c87b539fef596e8e578f4206960f312e63d
diff --git a/default.xml b/default.xml
index 1dd77d2..3f0b07f 100644
--- a/default.xml
+++ b/default.xml
@@ -3,7 +3,7 @@
   <remote  name="aosp"
            fetch=".."
            review="https://android-review.googlesource.com/" />
-  <default revision="ndk-release-r16"
+  <default revision="refs/tags/ndk-r16-beta1"
            remote="aosp"
            sync-j="4" />
   <project path="bionic" name="platform/bionic" groups="presubmit" />