Added the new Vulkan API functions to exported functions

src/dynapi/SDL_dynapi_overrides.h

@@ -629,3 +629,9 @@
 #define SDL_wcscmp SDL_wcscmp_REAL
 #define SDL_ComposeCustomBlendMode SDL_ComposeCustomBlendMode_REAL
 #define SDL_DuplicateSurface SDL_DuplicateSurface_REAL
+#define SDL_Vulkan_LoadLibrary SDL_Vulkan_LoadLibrary_REAL
+#define SDL_Vulkan_GetVkGetInstanceProcAddr SDL_Vulkan_GetVkGetInstanceProcAddr_REAL
+#define SDL_Vulkan_UnloadLibrary SDL_Vulkan_UnloadLibrary_REAL
+#define SDL_Vulkan_GetInstanceExtensions SDL_Vulkan_GetInstanceExtensions_REAL
+#define SDL_Vulkan_CreateSurface SDL_Vulkan_CreateSurface_REAL
+#define SDL_Vulkan_GetDrawableSize SDL_Vulkan_GetDrawableSize_REAL

src/dynapi/SDL_dynapi_procs.h

@@ -663,3 +663,9 @@ SDL_DYNAPI_PROC(void*,SDL_LoadFile_RW,(SDL_RWops *a, size_t *b, int c),(a,b,c),r
 SDL_DYNAPI_PROC(int,SDL_wcscmp,(const wchar_t *a, const wchar_t *b),(a,b),return)
 SDL_DYNAPI_PROC(SDL_BlendMode,SDL_ComposeCustomBlendMode,(SDL_BlendFactor a, SDL_BlendFactor b, SDL_BlendOperation c, SDL_BlendFactor d, SDL_BlendFactor e, SDL_BlendOperation f),(a,b,c,d,e,f),return)
 SDL_DYNAPI_PROC(SDL_Surface*,SDL_DuplicateSurface,(SDL_Surface *a),(a),return)
+SDL_DYNAPI_PROC(int,SDL_Vulkan_LoadLibrary,(const char *a),(a),return)
+SDL_DYNAPI_PROC(void*,SDL_Vulkan_GetVkGetInstanceProcAddr,(void),(),return)
+SDL_DYNAPI_PROC(void,SDL_Vulkan_UnloadLibrary,(void),(),)
+SDL_DYNAPI_PROC(SDL_bool,SDL_Vulkan_GetInstanceExtensions,(SDL_Window *a, unsigned *b, const char **c),(a,b,c),return)
+SDL_DYNAPI_PROC(SDL_bool,SDL_Vulkan_CreateSurface,(SDL_Window *a, VkInstance b, VkSurfaceKHR *c),(a,b,c),return)
+SDL_DYNAPI_PROC(void,SDL_Vulkan_GetDrawableSize,(SDL_Window *a, int *b, int *c),(a,b,c),)