Add building only CI (#25)

Testing isn't working yet because some tests require live Intel GPU and live NVIDIA GPU

.github/workflows/rust.yml

@@ -0,0 +1,54 @@
+name: Rust
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+    - uses: actions/cache@v2
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+    - name: Install intel compute runtime
+      run: |
+        mkdir neo
+        cd neo
+        wget https://github.com/intel/compute-runtime/releases/download/20.51.18762/intel-gmmlib_20.3.2_amd64.deb
+        wget https://github.com/intel/intel-graphics-compiler/releases/download/igc-1.0.5884/intel-igc-core_1.0.5884_amd64.deb
+        wget https://github.com/intel/intel-graphics-compiler/releases/download/igc-1.0.5884/intel-igc-opencl_1.0.5884_amd64.deb
+        wget https://github.com/intel/compute-runtime/releases/download/20.51.18762/intel-opencl_20.51.18762_amd64.deb
+        wget https://github.com/intel/compute-runtime/releases/download/20.51.18762/intel-ocloc_20.51.18762_amd64.deb
+        wget https://github.com/intel/compute-runtime/releases/download/20.51.18762/intel-level-zero-gpu_1.0.18762_amd64.deb
+
+        wget https://github.com/intel/compute-runtime/releases/download/20.51.18762/ww51.sum
+        sha256sum -c ww51.sum
+        
+        wget https://github.com/oneapi-src/level-zero/releases/download/v1.0.22/level-zero-devel_1.0.22+u18.04_amd64.deb
+        wget https://github.com/oneapi-src/level-zero/releases/download/v1.0.22/level-zero_1.0.22+u18.04_amd64.deb
+        wget https://github.com/intel/intel-graphics-compiler/releases/download/igc-1.0.5884/intel-igc-opencl-devel_1.0.5884_amd64.deb
+
+        sudo dpkg -i *.deb
+
+        sudo apt update
+        sudo apt install ocl-icd-opencl-dev
+    - name: Build
+      run: cargo build --verbose
+    # TODO(take-cheeze): Support testing
+    # - name: Run tests
+    #   run: cargo test --verbose