LTC pool connection error with antrouter R1-ltc
While running on Centos 7 "ltc" pool stumbled this problem and I couldn't find solution to it

### Steps to Reproduce

1. Enable ltc pool
2. Direct miner in my case it is antrouter RC1-ltc


### Expected behavior

No error

### Actual behavior

Error 

### Reproduces how often

100%

### Version

Latest git clone, Centos 7

### Additional Information

Connection error state: System.DllNotFoundException: Unable to load shared library 'libmultiha
   at Miningcore.Native.LibMultihash.scrypt(Byte* input, Void* output, UInt32 n, UInt32 r, UInt32 inputLength)
   at Miningcore.Crypto.Hashing.Algorithms.Scrypt.Digest(ReadOnlySpan`1 data, Span`1 result, Object[] extra) in /home/azuser/miningcore/src/Miningc
   at Miningcore.Blockchain.Bitcoin.BitcoinJob.ProcessShareInternal(StratumClient worker, String extraNonce2, UInt32 nTime, UInt32 nonce, Nullable`
   at Miningcore.Blockchain.Bitcoin.BitcoinJob.ProcessShare(StratumClient worker, String extraNonce2, String nTime, String nonce, String versionBit
   at Miningcore.Blockchain.Bitcoin.BitcoinJobManager.SubmitShareAsync(StratumClient worker, Object submission, Double stratumDifficultyBase, Cance
   at Miningcore.Blockchain.Bitcoin.BitcoinPool.OnSubmitAsync(StratumClient client, Timestamped`1 tsRequest, CancellationToken ct) in /home/azuser/
   at Miningcore.Blockchain.Bitcoin.BitcoinPool.OnRequestAsync(StratumClient client, Timestamped`1 tsRequest, CancellationToken ct) in /home/azuser
   at Miningcore.Stratum.StratumServer.OnRequestAsync(StratumClient client, JsonRpcRequest request, CancellationToken ct) in /home/azuser/miningcor
   at Miningcore.Stratum.StratumClient.ProcessRequestAsync(Func`4 onRequestAsync, ReadOnlySequence`1 lineBuffer) in /home/azuser/miningcore/src/Min
   at Miningcore.Stratum.StratumClient.ProcessReceivePipeAsync(TcpProxyProtocolConfig proxyProtocol, Func`4 onRequestAsync) in /home/azuser/miningc
[2019-08-17 16:43:48.1866] [I] [ltc] [0HLP3A9JEN6CF] Connection closed

