make it to work with react-native 0.40.0 and above

Author: alinz

ios/ReactNativeShareExtension.h

@@ -1,5 +1,5 @@
 #import <UIKit/UIKit.h>
-#import "RCTBridgeModule.h"
+#import "React/RCTBridgeModule.h"
 
 @interface ReactNativeShareExtension : UIViewController<RCTBridgeModule>
 - (UIView*) shareView;

ios/ReactNativeShareExtension.m

@@ -1,5 +1,5 @@
 #import "ReactNativeShareExtension.h"
-#import <RCTRootView.h>
+#import "React/RCTRootView.h"
 
 #define ITEM_IDENTIFIER @"public.url"
 #define IMAGE_IDENTIFIER @"public.image"