Install lld in the docker image

Author: sandhose

Dockerfile

@@ -91,6 +91,7 @@ RUN --network=default \
   $(if [ "${BUILDPLATFORM}" != "linux/amd64" ]; then echo "g++-x86-64-linux-gnu"; fi) \
   libc6-dev-amd64-cross \
   libc6-dev-arm64-cross \
+  lld \
   g++
 
 # Setup the cross-compilation environment