CIP: Bump version suffix to -cip4 after merge from stable

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
diff --git a/localversion-cip b/localversion-cip
index 0c9838e..710987b 100644
--- a/localversion-cip
+++ b/localversion-cip
@@ -1 +1 @@
--cip3
+-cip4