Fix compilation error in LITE mode (#5391)

Summary:
Add macro ROCKSDB_LITE to fix compilation.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5391

Differential Revision: D15574522

Pulled By: riversand963

fbshipit-source-id: 95aea83c5d9b2bf98a3ba0ef9167b63c9be2988b

tools/db_bench_tool.cc

@@ -2974,10 +2974,13 @@ class Benchmark {
                   ->ToString()
                   .c_str());
     }
+
+#ifndef ROCKSDB_LITE
     if (FLAGS_use_secondary_db) {
       fprintf(stdout, "Secondary instance updated  %" PRIu64 " times.\n",
               secondary_db_updates_);
     }
+#endif  // ROCKSDB_LITE
   }
 
  private: