Update SDL2 to latest source (1a50334)

libs/SDL2/.github/workflows/os2.yml

@@ -0,0 +1,26 @@
+name: Build (OS/2)
+
+on: [push, pull_request]
+
+jobs:
+  os2:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Cache OpenWatcom
+        uses: actions/cache@v2
+        env:
+          cache-name: cache-openwatcom
+        with:
+          path: ~/openwatcom
+          key: ${{ runner.os }}-build-${{ env.cache-name }}
+
+      - name: Download OpenWatcom if not cached
+        run: if [ ! -d ~/openwatcom/binl64 ]; then wget --no-verbose 'https://github.com/open-watcom/open-watcom-v2/releases/download/Current-build/open-watcom-2_0-c-linux-x64' -O ~/ow.zip && mkdir -p ~/openwatcom && cd ~/openwatcom && unzip ~/ow.zip && chmod -R a+rx ~/openwatcom ; fi
+        shell: bash
+
+      - name: Build
+        run: WATCOM="$HOME/openwatcom" build-scripts/os2-buildbot.sh
+        shell: bash         
+

libs/SDL2/.github/workflows/psp.yaml

@@ -0,0 +1,18 @@
+name: Build (Sony Playstation Portable)
+
+on: [push, pull_request]
+
+jobs:
+  psp:
+    runs-on: ubuntu-latest
+    container: pspdev/pspdev:latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup dependencies
+      run: |
+        apk update 
+        apk add cmake gmp mpc1 mpfr4 make
+    - name: Configure CMake
+      run: cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=$PSPDEV/psp/share/pspdev.cmake -DSDL_TEST=ON
+    - name: Build
+      run: cmake --build build