Manifest for Android NDK r19 Release (build 5232133)

Change-Id: Id24706efc3f17267cbbb6ed628e99a1edb42614e
diff --git a/default.xml b/default.xml
index 53641a9..a9aaf08 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-r19"
+  <default revision="refs/tags/ndk-r19"
            remote="aosp"
            sync-j="4" />
   <project path="bionic" name="platform/bionic" groups="presubmit" />