Migrate names of properties from 'leveldb' prefix to 'rocksdb' prefix.

Summary: Migrate names of properties from 'leveldb' prefix to 'rocksdb' prefix.

Test Plan: make check

Reviewers: emayanke, haobo

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D13311

util/stack_trace.h

@@ -1,6 +1,4 @@
-#ifndef STACK_TRACE_H
-#define STACK_TRACE_H
-
+#pragma once
 namespace rocksdb {
 
 // Install a signal handler to print callstack on the following signals:
@@ -9,5 +7,3 @@ namespace rocksdb {
 void InstallStackTraceHandler();
 
 }   // namespace rocksdb
-
-#endif