Update version for 1.6.0-rc2

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/VERSION b/VERSION
index 80b2369..fc7c9a4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.5.91
+1.5.92