Merge remote-tracking branch 'origin/prism_dev'

* origin/prism_dev:
  Merge prism.xml into default.xml.
  Add opensource/tarballs to prism.
  Add manifest file for ONT(prism).

Change-Id: Ifef52880eebed78b1d53fc5961d7b1eb762734f9
diff --git a/default.xml b/default.xml
index 653c27a..8e6fc8d 100644
--- a/default.xml
+++ b/default.xml
@@ -4,7 +4,7 @@
     fetch="https://gfiber-internal.googlesource.com/"
     name="gfiber-internal"
     review="https://gfiber-internal-review.googlesource.com/"/>
-  <default remote="gfiber-internal" revision="prism_dev" sync-j="12"/>
+  <default remote="gfiber-internal" revision="master" sync-j="12"/>
   <manifest-server
     url="http://gfiber-autobot.mtv.corp.google.com:8000/manifest"/>