Make it possible to connect to ADB running on other computers.

lib/roles/provider.js

@@ -14,7 +14,10 @@ var lifecycle = require('../util/lifecycle')
 
 module.exports = function(options) {
   var log = logger.createLogger('provider')
-  var client = adb.createClient()
+  var client = adb.createClient({
+    host: options.adbHost
+  , port: options.adbPort
+  })
   var workers = {}
   var solo = wireutil.makePrivateChannel()
   var lists = {