[react-native-webrtc] ios: fix build when using `use_frameworks!`

ios/Podfile.lock

     - React
   - react-native-locale-detector (1.0.0):
     - React
-  - react-native-webrtc (1.58.2)
+  - react-native-webrtc (1.58.2):
+    - React
   - React/BatchedBridge (0.51.0):
     - React/Core
     - React/cxxreact_legacy
   react-native-fetch-blob: 63394b1d7b0781547b3e4463b3195790177b1222
   react-native-keep-awake: 0de4bd66de0c23178107dce0c2fcc3354b2a8e94
   react-native-locale-detector: d1b2c6fe5abb56e3a1efb6c2d6f308c05c4251f1
-  react-native-webrtc: bc044ca9530fc802e7533f247aa08fe1b6bf8dc5
+  react-native-webrtc: 31b6d3f1e3e2ce373aa43fd682b04367250f807d
   RNSound: b360b3862d3118ed1c74bb9825696b5957686ac4
   RNVectorIcons: c0dbfbf6068fefa240c37b0f71bd03b45dddac44
   yoga: 17521bbb0dd54a47c0b3ac43253e78cdac7488e0

package-lock.json

       }
     },
     "react-native-webrtc": {
-      "version": "github:jitsi/react-native-webrtc#84aee6693195c5be6b6f5f794a1e52dc7913fb3b",
+      "version": "github:jitsi/react-native-webrtc#52fe4646401408e0569e972cabf08f3c21b7a107",
       "requires": {
         "base64-js": "1.2.3",
         "event-target-shim": "1.1.1",

package.json

     "react-native-prompt": "1.0.0",
     "react-native-sound": "0.10.9",
     "react-native-vector-icons": "4.4.2",
-    "react-native-webrtc": "github:jitsi/react-native-webrtc#84aee6693195c5be6b6f5f794a1e52dc7913fb3b",
+    "react-native-webrtc": "github:jitsi/react-native-webrtc#52fe4646401408e0569e972cabf08f3c21b7a107",
     "react-redux": "5.0.6",
     "redux": "3.7.2",
     "redux-thunk": "2.2.0",