bump VERSION to 17.06.0-ce-rc5

Signed-off-by: Eli Uriegas <eli.uriegas@docker.com>
diff --git a/VERSION b/VERSION
index 3da0910..e319f3f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-17.06.0-ce-rc4
+17.06.0-ce-rc5