As of https://github.com/facebook/rocksdb/commit/21696ba502d7b2191d6e9c984536f3cc1fc452dd MongoRocks compile is failing in evergreen because rocksdb::Iterator doesn't include runtime information, which MongoRocks depend on. To fix, we need to pass USE_RTTI=1 when compiling RocksDB.

I already updated readme in the MongoRocks repo: https://github.com/mongodb-partners/mongo-rocks/commit/3ffce604ac6399b4be0dcd90c47010d3b022dd93