Fix LAN instead of Wi-Fi device bundle config (facebook#27575)

Summary:
React-native server-device connection must be via Wi-Fi. But if the OS-X server has LAN & Wi-Fi interfaces, then device bundle can be incorrectly configured to  use LAN interface instead of Wi-Fi. This patch fix this issue. It greps for "baseT" (e.g. media: autoselect (1000baseT <full-duplex>)) and skip interface if it is.

## Changelog

[iOS] [Fixed] - Fix LAN instead of Wi-Fi device bundle configuration
Pull Request resolved: facebook#27575

Test Plan:
To reproduce an issue setup Mac OS 10.15.1 with LAN and Wi-Fi active interfaces. And connect
real device (not simulator).

And "ifconfig en0" in console should display LAN interface e.g.:
```
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=50b<RXCSUM,TXCSUM,VLAN_HWTAGGING,AV,CHANNEL_IO>
	ether 78:7b:8a:d8:61:42
	inet 10.15.61.16 netmask 0xffffff00 broadcast 10.15.61.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect (1000baseT <full-duplex>)
	status: active

```
"ifconfig eg1" in console should display WiFi interface e.g.:
```
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=400<CHANNEL_IO>
	ether 14:20:5e:03:5b:2a
	inet6 fe80::10e6:1cb6:54ec:1b41%en1 prefixlen 64 secured scopeid 0x5
	inet 10.15.91.27 netmask 0xffffff00 broadcast 10.15.91.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
```

In this case device bundle in react-native-xcode.sh script wood be incorrectly configured to use en0 (LAN interface) instead of en1(Wi-Fi) interface.

My patch fixes this issue.

fragment of script output before patch:
```
...
++ ipconfig getifaddr en0
+ IP=10.15.61.16
+ '[' -z 10.15.61.16 ']
+ '[' -z 10.15.61.16 ']'
+ echo 10.15.61.16
+ [[ -n '' ]]
...
```
After start project ob device we have time lag about 20s then debug out:
`
2019-12-20 16:58:57.530538+0300 AwesomeProject[4590:1923358] Task <164D9AB0-8473-4BA3-BD1A-EC0E92887C17>.<1> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={NSUnderlyingError=0x2838dc2d0 {Error Domain=kCFErrorDomainCFNetwork Code=-1001 "(null)" UserInfo={_kCFStreamErrorCodeKey=-2102, _kCFStreamErrorDomainKey=4}}, NSErrorFailingURLStringKey=http://10.15.61.16:8081/status, NSErrorFailingURLKey=http://10.15.61.16:8081/status, _kCFStreamErrorDomainKey=4, _kCFStreamErrorCodeKey=-2102, NSLocalizedDescription=The request timed out.}
`

fragment of script output after apply patch:
```
...
++ ipconfig getifaddr en0
+ IP=10.15.61.16
+ [[ -z 10.15.61.16 ]]
++ ifconfig
++ grep baseT
+ [[ -n 	media: autoselect (1000baseT <full-duplex>)
	media: autoselect (100baseTX <full-duplex>) ]]
++ ipconfig getifaddr en1
+ IP=10.15.91.27
+ '[' -z 10.15.91.27 ']'
+ echo 10.15.91.27
+ [[ -n '' ]]
...
```

App start OK.

On iPhone /iPad simulator works too.

Differential Revision: D19200334

Pulled By: hramos

fbshipit-source-id: 22d791b657abd16a92d075515682b4fa961b489c

scripts/react-native-xcode.sh

@@ -15,7 +15,7 @@ DEST=$CONFIGURATION_BUILD_DIR/$UNLOCALIZED_RESOURCES_FOLDER_PATH
 # Enables iOS devices to get the IP address of the machine running Metro
 if [[ "$CONFIGURATION" = *Debug* && ! "$PLATFORM_NAME" == *simulator ]]; then
   IP=$(ipconfig getifaddr en0)
-  if [ -z "$IP" ]; then
+  if [[ -z "$IP" || -n "`ifconfig $value | grep 'baseT'`" ]]; then
     IP=$(ipconfig getifaddr en1)
   fi
   if [ -z "$IP" ]; then