pickup new rocksdb with support for linux cmake

This picksup a new version of rocksdb with support for
linux cmake.

Signed-off-by: Bassam Tabbara <bassam.tabbara@quantum.com>

diff --git a/src/rocksdb b/src/rocksdb
index 043cb62d638d94d840038db86f46b369d9bb1bc1..60a2bbba94a316c7a836425ffa68ae3e3f547b25 160000 (submodule)
--- a/src/rocksdb
+++ b/src/rocksdb
@@ -1 +1 @@
-Subproject commit 043cb62d638d94d840038db86f46b369d9bb1bc1
+Subproject commit 60a2bbba94a316c7a836425ffa68ae3e3f547b25