fixed swizzle in xcode 8

ios/RNNSwizzles.m

 - (id)__swz_initWithEventDispatcher:(id)eventDispatcher
 {
 	id returnValue = __SWZ_initWithEventDispatcher_orig(self, _cmd, eventDispatcher);
-	
+
+	#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_11_0	
 	if (@available(iOS 11.0, *)) {
 		[(UIScrollView*)[returnValue valueForKey:@"scrollView"] setContentInsetAdjustmentBehavior:UIScrollViewContentInsetAdjustmentAutomatic];
 	}
+	#endif
 	
 	return returnValue;
 }