move shaders folder inside of sdl2

targets/platform/sdl2/Render.cpp

@@ -49,20 +49,20 @@ C4JRender RenderManager;
 
 #ifdef GLES
 static const char* VERT_SRC =
-#include "shaders/vertex_es.vert"
+#include "sdl2/shaders/vertex_es.vert"
 
     ;
 static const char* FRAG_SRC =
-#include "shaders/fragment_es.frag"
+#include "sdl2/shaders/fragment_es.frag"
 
     ;
 #else
 static const char* VERT_SRC =
-#include "shaders/vertex.vert"
+#include "sdl2/shaders/vertex.vert"
 
     ;
 static const char* FRAG_SRC =
-#include "shaders/fragment.frag"
+#include "sdl2/shaders/fragment.frag"
     ;
 #endif