libsdl2: upgrade 2.30.3 -> 2.30.4

libsdl2: upgrade 2.30.3 -> 2.30.4

ChangeLog:
https://github.com/libsdl-org/SDL/releases/tag/release-2.30.4

This is a stable bugfix release, with the following changes:
 * Android rotation will respect user rotation lock preferences
 * Fixed spurious Left-Ctrl key input when the Right Alt key (AltGr) is
   pressed on Windows
 * Added support for the Saitek Cyborg V.3 Rumble Pad in PS3 mode
 * Added support for the Razer Kitsune in PS5 mode
 * Added Linux bindings for the Qanba Drone 2 Arcade Joystick
 * Leave Nintendo Online controllers in simple report mode so they work
   with DirectInput games
 * Enable using libusb for GameCube controllers when available

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>