ci: add llvm

.github/workflows/ci.yml

@@ -8,6 +8,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Install LLVM and Clang
+        uses: KyleMayes/install-llvm-action@v1
+        with:
+          version: "10.0"
+          directory: ${{ runner.temp }}/llvm
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
@@ -22,6 +27,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Install LLVM and Clang
+        uses: KyleMayes/install-llvm-action@v1
+        with:
+          version: "10.0"
+          directory: ${{ runner.temp }}/llvm
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
@@ -36,6 +46,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Install LLVM and Clang
+        uses: KyleMayes/install-llvm-action@v1
+        with:
+          version: "10.0"
+          directory: ${{ runner.temp }}/llvm
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
@@ -52,6 +67,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Install LLVM and Clang
+        uses: KyleMayes/install-llvm-action@v1
+        with:
+          version: "10.0"
+          directory: ${{ runner.temp }}/llvm
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal