New basic filter sample added

samples/cpp/tutorial_code/Basic/AddingImages.cpp

@@ -32,8 +32,8 @@ int main( int argc, char** argv )
      { alpha = input; }
 
    /// Read image ( same size, same type )
-   src1 = imread("../../images/LinuxLogo.jpg");
-   src2 = imread("../../images/WindowsLogo.jpg");
+   src1 = imread("../images/LinuxLogo.jpg");
+   src2 = imread("../images/WindowsLogo.jpg");
 
    if( !src1.data ) { printf("Error loading src1 \n"); return -1; }
    if( !src2.data ) { printf("Error loading src2 \n"); return -1; }