update SDL soruce to 2.0.14

Edward Rudd

2021-06-15 dec7875a6e23212021e4d9080330a42832dfe02a

 source/src/events/SDL_keyboard_c.h

@@ -49,6 +49,13 @@

/* Send a keyboard key event */
extern int SDL_SendKeyboardKey(Uint8 state, SDL_Scancode scancode);
extern int SDL_SendKeyboardKeyAutoRelease(SDL_Scancode scancode);

/* Release all the autorelease keys */
extern void SDL_ReleaseAutoReleaseKeys(void);

/* Return true if any hardware key is pressed */
extern SDL_bool SDL_HardwareKeyboardKeyPressed(void);

/* Send keyboard text input */
extern int SDL_SendKeyboardText(const char *text);