Add SDL_gpu.inc

Author: Free-Pascal-meets-SDL-Website

units/SDL3.pas

@@ -104,6 +104,7 @@ interface
 {$I SDL_camera.inc}                       // 3.1.6-prev
 {$I SDL_events.inc}                       // 3.1.6-prev
 {$I SDL_render.inc}                       // 3.1.6-prev
+{$I SDL_gpu.inc}                          // 3.2.0
 {$I SDL_clipboard.inc}                    // 3.2.0
 {$I SDL_cpuinfo.inc}                      // 3.2.0
 {$I SDL_dialog.inc}                       // 3.2.0