Build llvm

Author: miry

.github/workflows/llvm.yml

@@ -26,3 +26,10 @@ jobs:
           sudo chown $(whoami) /opt/llvm/
           sudo mkdir -p /var/cache
           sudo chown $(whoami) /var/cache
+          
+      - name: Build
+        run: |
+          cd omnibus
+          bundle check || bundle install --binstubs
+          bundle exec omnibus build llvm
+          ls -la omnibus/pkg