opencl-ci: use RUNNER_TEMP instead of github.workspace

Author: max-krasnyansky

.github/workflows/build.yml

@@ -757,7 +757,7 @@ jobs:
           - build: 'msvc-arm64'
             defines: '-G "Ninja Multi-Config" -D CMAKE_TOOLCHAIN_FILE=cmake/arm64-windows-msvc.cmake -DGGML_NATIVE=OFF -DLLAMA_BUILD_SERVER=ON -DBUILD_SHARED_LIBS=ON'
           - build: 'llvm-arm64-opencl-adreno'
-            defines: '-G "Ninja Multi-Config" -D CMAKE_TOOLCHAIN_FILE=cmake/arm64-windows-llvm.cmake -DCMAKE_PREFIX_PATH=${{github.workspace}}/opencl-arm64-release -DGGML_OPENCL=ON -DGGML_OPENCL_SMALL_ALLOC=ON -DGGML_OPENCL_USE_ADRENO_KERNELS=ON -DGGML_OPENCL_EMBED_KERNELS=ON'
+            defines: '-G "Ninja Multi-Config" -D CMAKE_TOOLCHAIN_FILE=cmake/arm64-windows-llvm.cmake -DCMAKE_PREFIX_PATH=$env:RUNNER_TEMP/opencl-arm64-release -DGGML_OPENCL=ON -DGGML_OPENCL_USE_ADRENO_KERNELS=ON'
 
     steps:
       - name: Clone
@@ -810,15 +810,15 @@ jobs:
             -DBUILD_TESTING=OFF `
             -DOPENCL_HEADERS_BUILD_TESTING=OFF `
             -DOPENCL_HEADERS_BUILD_CXX_TESTS=OFF `
-            -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/opencl-arm64-release
+            -DCMAKE_INSTALL_PREFIX="$env:RUNNER_TEMP/opencl-arm64-release"
           cmake --build . --target install
           git clone https://github.com/KhronosGroup/OpenCL-ICD-Loader
           cd OpenCL-ICD-Loader
           mkdir build-arm64-release && cd build-arm64-release
           cmake .. `
             -A arm64 `
-            -DCMAKE_PREFIX_PATH=${{github.workspace}}/opencl-arm64-release `
-            -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/opencl-arm64-release
+            -DCMAKE_PREFIX_PATH="$env:RUNNER_TEMP/opencl-arm64-release" `
+            -DCMAKE_INSTALL_PREFIX="$env::RUNNER_TEMP/opencl-arm64-release"
           cmake --build . --target install --config release
 
       - name: Build