readd dependency but with static version

Author: kbahr

proteus-client/build.gradle

@@ -10,6 +10,7 @@ dependencies {
     compile 'com.typesafe:config'
     compile 'com.google.guava:guava'
     compile 'io.rsocket.rpc:rsocket-rpc-core'
+    compile "io.netty:netty-tcnative:2.0.18.Final:linux-x86_64"
 
     testProtobuf 'io.rsocket.rpc:rsocket-rpc-protobuf-idl'
     testCompile project(':proteus-tracing-openzipkin')