update cpp samples and tutorials

samples/winrt/FaceDetection/FaceDetection/MainPage.xaml.cpp

@@ -7,9 +7,9 @@
 #include "MainPage.xaml.h"
 
 #include <opencv2\imgproc\types_c.h>
-#include <opencv2\imgcodecs\imgcodecs.hpp>
-#include <opencv2\core\core.hpp>
-#include <opencv2\imgproc\imgproc.hpp>
+#include <opencv2\imgcodecs.hpp>
+#include <opencv2\core.hpp>
+#include <opencv2\imgproc.hpp>
 #include <opencv2\highgui.hpp>
 #include <opencv2\highgui\highgui_winrt.hpp>
 
@@ -78,4 +78,4 @@ void FaceDetection::MainPage::detectBtn_Click(Platform::Object^ sender, Windows:
     } else {
         Windows::UI::Popups::MessageDialog("Initialize image before processing \n").ShowAsync();
     }
-}
+}