Update FULL_BINHOST="https://commondatastorage.googleapis.com/chromeos-prebuilt/board/arm-generic/full-18.03.12.155713/packages/" in /b/cbuild/src/overlays/overlay-arm-generic/prebuilt.conf

Change-Id: Icf46c607006c113f97b127aab948e191da728e59
diff --git a/overlay-arm-generic/prebuilt.conf b/overlay-arm-generic/prebuilt.conf
index 0f44d75..6ac8803 100644
--- a/overlay-arm-generic/prebuilt.conf
+++ b/overlay-arm-generic/prebuilt.conf
@@ -1 +1 @@
-FULL_BINHOST="https://commondatastorage.googleapis.com/chromeos-prebuilt/board/arm-generic/full-18.03.12.121855/packages/"
+FULL_BINHOST="https://commondatastorage.googleapis.com/chromeos-prebuilt/board/arm-generic/full-18.03.12.155713/packages/"