prebuilt.conf: updating FULL_BINHOST

Change-Id: If93140ee250c7c0bc4645be7e8b34ee0ec0e3b5c
diff --git a/overlay-kevin64/prebuilt.conf b/overlay-kevin64/prebuilt.conf
index 9595f28..4bbdd14 100644
--- a/overlay-kevin64/prebuilt.conf
+++ b/overlay-kevin64/prebuilt.conf
@@ -1 +1 @@
-FULL_BINHOST="gs://chromeos-prebuilt/board/kevin64/full-R75-12052.0.0-rc1/packages/"
+FULL_BINHOST="gs://chromeos-prebuilt/board/kevin64/full-R75-12052.0.0-rc2/packages/"