cmake: remove SDL_STATIC_PIC cmake option.

Use CMAKE_POSITION_INDEPENDENT_CODE instead

.github/workflows/android.yml

@@ -70,7 +70,7 @@ jobs:
             -DANDROID_ABI=${{ matrix.platform.android_abi }} \
             -DSDL_SHARED=ON \
             -DSDL_STATIC=ON \
-            -DSDL_STATIC_PIC=ON \
+            -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
             -DSDL_VENDOR_INFO="Github Workflow" \
             -DCMAKE_INSTALL_PREFIX=prefix \
             -DCMAKE_BUILD_TYPE=Release \

.github/workflows/main.yml

@@ -111,6 +111,7 @@ jobs:
           -DSDL_CLANG_TIDY=ON \
           -DSDL_DISABLE_INSTALL_DOCS=${{ !matrix.platform.no-perl }} \
           -DCMAKE_INSTALL_PREFIX=cmake_prefix \
+          -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
           -DCMAKE_BUILD_TYPE=Release \
           ${{ matrix.platform.cmake-platform }} \
           ${{ matrix.platform.cmake }}