Fixed bug size does not change when the screen is rotated. (cocos2d#20662)

Author: nk-5

cocos/platform/ios/CCEAGLView-ios.mm

@@ -70,6 +70,7 @@ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 #import "base/CCIMEDispatcher.h"
 #import "renderer/backend/metal/DeviceMTL.h"
 #import "platform/ios/CCInputView-ios.h"
+#include "renderer/backend/metal/Utils.h"
 
 //CLASS IMPLEMENTATIONS:
 
@@ -195,6 +196,8 @@ - (void) layoutSubviews
     size_.width *= self.contentScaleFactor;
     size_.height *= self.contentScaleFactor;
 
+    cocos2d::backend::Utils::resizeDefaultAttachmentTexture(size_.width, size_.height);
+
     // Avoid flicker. Issue #350
     if ([NSThread isMainThread])
     {