updated dynapi after latest api addition

src/dynapi/SDL2.exports

@@ -872,3 +872,4 @@
 ++'_SDL_DestroyWindowSurface'.'SDL2.dll'.'SDL_DestroyWindowSurface'
 # ++'_SDL_GDKGetDefaultUser'.'SDL2.dll'.'SDL_GDKGetDefaultUser'
 ++'_SDL_GameControllerGetSteamHandle'.'SDL2.dll'.'SDL_GameControllerGetSteamHandle'
+# ++'_SDL_WinRTGetProtocolActivationURI'.'SDL2.dll'.'SDL_WinRTGetProtocolActivationURI'

src/dynapi/SDL_dynapi_overrides.h

@@ -898,3 +898,4 @@
 #define SDL_DestroyWindowSurface SDL_DestroyWindowSurface_REAL
 #define SDL_GDKGetDefaultUser SDL_GDKGetDefaultUser_REAL
 #define SDL_GameControllerGetSteamHandle SDL_GameControllerGetSteamHandle_REAL
+#define SDL_WinRTGetProtocolActivationURI SDL_WinRTGetProtocolActivationURI_REAL

src/dynapi/SDL_dynapi_procs.h

@@ -985,3 +985,6 @@ SDL_DYNAPI_PROC(int,SDL_DestroyWindowSurface,(SDL_Window *a),(a),return)
 SDL_DYNAPI_PROC(int,SDL_GDKGetDefaultUser,(XUserHandle *a),(a),return)
 #endif
 SDL_DYNAPI_PROC(Uint64,SDL_GameControllerGetSteamHandle,(SDL_GameController *a),(a),return)
+#if defined(__WINRT__)
+SDL_DYNAPI_PROC(char*,SDL_WinRTGetProtocolActivationURI,(void),(),return)
+#endif