Added SDL_BlitSurfaceTiled()

Fixes https://gamedev.stackexchange.com/questions/136792/is-there-a-way-to-set-texture-wrap-mode-as-repeat-in-sdl-2

test/testautomation_images.h

@@ -24,6 +24,7 @@ typedef struct SDLTest_SurfaceImage_s {
 
 /* Test images */
 extern SDL_Surface *SDLTest_ImageBlit(void);
+extern SDL_Surface *SDLTest_ImageBlitTiled(void);
 extern SDL_Surface *SDLTest_ImageBlitColor(void);
 extern SDL_Surface *SDLTest_ImageFace(void);
 extern SDL_Surface *SDLTest_ImagePrimitives(void);