Added ProfaneDB
Added ProfaneDB

Summary:
Added my project [ProfaneDB](https://profanedb.gitlab.io/) which uses RocksDB as the main storage engine
Closes https://github.com/facebook/rocksdb/pull/3182

Differential Revision: D6370847

Pulled By: ajkr

fbshipit-source-id: ff4bb6bdbc6e42fdb88bd793a84a0e04c129b6ae

SunguckLee/RocksDB,Andymic/rocksdb,SunguckLee/RocksDB,SunguckLee/RocksDB,Andymic/rocksdb,SunguckLee/RocksDB,SunguckLee/RocksDB,Andymic/rocksdb,Andymic/rocksdb,SunguckLee/RocksDB,SunguckLee/RocksDB,Andymic/rocksdb,Andymic/rocksdb,Andymic/rocksdb,Andymic/rocksdb,SunguckLee/RocksDB