libsdl2: upgrade 2.30.0 -> 2.30.1

libsdl2: upgrade 2.30.0 -> 2.30.1

Changelog:
===========
-Fixed a regression causing SDL_WaitEvent() to return spurious failures
-Fixed X11 cursors on the latest release of GNOME
-Wayland windows automatically have OpenGL enabled again
-Fixed memory corruption when converting signed 16-bit audio to float
-Fixed audio artifacts when converting signed 8-bit audio to float
-Fixed the clip rectangle not being updated when the viewport changes in the SDL renderer
-Convert mouse wheel coordinates to the rendering view in the SDL renderer
-Fixed a crash handling controllers on macOS
-Fixed a crash setting a window fullscreen with Emscripten
-Fixed the keyboard automatically popping up when resuming an application on Android

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>