Fix for issue #386 - camera cras- ios 10 simulator

ios/RCTCameraManager.m

@@ -30,9 +30,10 @@ RCT_EXPORT_MODULE();
 - (UIView *)view
 {
   self.session = [AVCaptureSession new];
-
+  #if !(TARGET_IPHONE_SIMULATOR)
     self.previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:self.session];
     self.previewLayer.needsDisplayOnBoundsChange = YES;
+  #endif
   
   if(!self.camera){
     self.camera = [[RCTCamera alloc] initWithManager:self bridge:self.bridge];