prebuilt.conf: updating FULL_BINHOST

Change-Id: I498ed35dff9bb27a12f50794668b5aa91d46b8b1
diff --git a/overlay-lakitu/prebuilt.conf b/overlay-lakitu/prebuilt.conf
index 554fd1a..5f83579 100644
--- a/overlay-lakitu/prebuilt.conf
+++ b/overlay-lakitu/prebuilt.conf
@@ -1 +1 @@
-FULL_BINHOST="gs://chromeos-prebuilt/board/lakitu/full-R78-12385.0.0-rc1/packages/"
+FULL_BINHOST="gs://chromeos-prebuilt/board/lakitu/full-R78-12385.0.0-rc2/packages/"