update SDL soruce to 2.0.14

Edward Rudd

2021-06-15 dec7875a6e23212021e4d9080330a42832dfe02a

 source/src/core/linux/SDL_evdev.c

@@ -39,11 +39,11 @@
#include <linux/input.h>

#include "SDL.h"
#include "SDL_assert.h"
#include "SDL_endian.h"
#include "SDL_scancode.h"
#include "../../events/SDL_events_c.h"
#include "../../events/scancodes_linux.h" /* adds linux_scancode_table */
#include "../../core/linux/SDL_evdev_capabilities.h"
#include "../../core/linux/SDL_udev.h"

/* These are not defined in older Linux kernel headers */