rocksdb: pickup fix to detect PMULL instruction

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/rocksdb b/src/rocksdb
index f86d378860f399bf595bd1135f39f03a9eaca59f..8ab4c1aa3f1c7d89077d7f81e7d457e8333a0430 160000 (submodule)
--- a/src/rocksdb
+++ b/src/rocksdb
@@ -1 +1 @@
-Subproject commit f86d378860f399bf595bd1135f39f03a9eaca59f
+Subproject commit 8ab4c1aa3f1c7d89077d7f81e7d457e8333a0430