Merge remote-tracking branch 'origin/prism_dev'

* origin/prism_dev:
  Add vendor/google/prism
  Add toolchains/kvm.

Change-Id: Ic9d557f456d51fd1c891caf291637ba402e36a47
diff --git a/default.xml b/default.xml
index 5a77f59..8adeb91 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"/>