fix valgrind error in c_test caused by BlockBasedTableOptions

Summary:
It was creating BlockBasedTableOptions object in a loop without calling
destroy()

Test Plan: valgrind ./c_test --leak-check=full --show-reachable=yes

Reviewers: sdong, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22431

db/c_test.c

@@ -542,7 +542,6 @@ int main(int argc, char** argv) {
       policy = rocksdb_filterpolicy_create_bloom(10);
     }
 
-    table_options = rocksdb_block_based_options_create();
     rocksdb_block_based_options_set_filter_policy(table_options, policy);
 
     // Create new database