Add OSK and message box support to SDL2

This was added in PRs, but there is no release for it yet, so I'm using the patch files from the PRs.

sdl2/PSPBUILD

@@ -1,6 +1,6 @@
 pkgname=sdl2
 pkgver=2.30.2
-pkgrel=3
+pkgrel=4
 pkgdesc="a library designed to provide low level access to audio, input, and graphics hardware"
 arch=('mips')
 url="https://wiki.libsdl.org/SDL2/FrontPage"
@@ -12,12 +12,16 @@ provides=('sdl2-main')
 source=(
     "https://github.com/libsdl-org/SDL/releases/download/release-${pkgver}/SDL2-${pkgver}.tar.gz"
     "https://github.com/libsdl-org/SDL/pull/9953.patch"
+    "https://github.com/libsdl-org/SDL/pull/9970.patch"
+    "https://github.com/libsdl-org/SDL/pull/9977.patch"
     "CMakeLists.txt.sample"
     "main.c.sample"
 )
 sha256sums=(
     "891d66ac8cae51361d3229e3336ebec1c407a8a2a063b61df14f5fdf3ab5ac31"
     "f465c3914901fa6e49e5389c8bb5ec2ede21a620c431b8fd6bc55e315ddb5523"
+    "cc1c85198aa66023d0c3cb2117d855d699908da216357d195bfe4c8415ab7cbd"
+    "ce36079fe087a3e7956aa719b0687c797ade2387943e8d23feb39489ba88fcb2"
     "SKIP"
     "SKIP"
 )