scripts: gha: fix ios ci builds not including game libs

Author: ksagameng2

scripts/gha/build_ios.sh

@@ -9,7 +9,8 @@ cd "$GITHUB_WORKSPACE" || die
 cp -vr /Library/Frameworks/SDL2.framework ./build
 
 pushd hlsdk || die
-cmake -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_DEPLOYMENT_TARGET=12.0 -DGAMEDIR=$(realpath ../build/ios) -DCMAKE_BUILD_TYPE=Debug -B build -S .
+mkdir -p ../build/ios/libs
+cmake -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_DEPLOYMENT_TARGET=12.0 -DCMAKE_INSTALL_PREFIX=$(realpath ../build/ios/libs) -DCMAKE_BUILD_TYPE=Debug -B build -S .
 cmake --build build --target install || die
 popd || die