Pass port when running on device (fix #17973)

Summary:
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Building for iOS device `react-native run-ios --device [id]` fails since port is not passed. This is a blocker for us and prevents us from updating to latest React Native stable.

I've tested this in our app and also in fresh app using RN master and verified that it works.

None.

[CLI] [BUGFIX] [local-cli/runIOS/runIOS.js] - Pass metro port when running on device
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  CATEGORY
[----------]        TYPE
[ CLI      ]   [-------------]      LOCATION
[ DOCS     ]   [ BREAKING    ]   [-------------]
[ GENERAL  ]   [ BUGFIX      ]   [-{Component}-]
[ INTERNAL ]   [ ENHANCEMENT ]   [ {File}      ]
[ IOS      ]   [ FEATURE     ]   [ {Directory} ]   |-----------|
[ ANDROID  ]   [ MINOR       ]   [ {Framework} ] - | {Message} |
[----------]   [-------------]   [-------------]   |-----------|

[CATEGORY] [TYPE] [LOCATION] - MESSAGE

 EXAMPLES:

 [IOS] [BREAKING] [FlatList] - Change a thing that breaks other things
 [ANDROID] [BUGFIX] [TextInput] - Did a thing to TextInput
 [CLI] [FEATURE] [local-cli/info/info.js] - CLI easier to do things with
 [DOCS] [BUGFIX] [GettingStarted.md] - Accidentally a thing/word
 [GENERAL] [ENHANCEMENT] [Yoga] - Added new yoga thing/position
 [INTERNAL] [FEATURE] [./scripts] - Added thing to script that nobody will see
-->
Closes https://github.com/facebook/react-native/pull/17983

Differential Revision: D6988299

Pulled By: hramos

fbshipit-source-id: 5169706600f87f13b9c9c105eb7d6db7a40194f1

local-cli/runIOS/runIOS.js

@@ -68,7 +68,7 @@ function runIOS(argv, config, args) {
   if (args.device) {
     const selectedDevice = matchingDevice(devices, args.device);
     if (selectedDevice) {
-      return runOnDevice(selectedDevice, scheme, xcodeProject, args.configuration, args.packager, args.verbose);
+      return runOnDevice(selectedDevice, scheme, xcodeProject, args.configuration, args.packager, args.verbose, args.port);
     } else {
       if (devices && devices.length > 0) {
         console.log('Could not find device with the name: "' + args.device + '".');