meson CI: add lld to clang

Signed-off-by: Rosen Penev <rosenp@gmail.com>

.github/workflows/on_PR_meson_clang.yaml

@@ -20,13 +20,14 @@ jobs:
 
       - name: Install packages
         run: |
-          sudo apt install -y clang-${{matrix.cxx}} libc++abi-${{matrix.cxx}}-dev libc++-${{matrix.cxx}}-dev
+          sudo apt install -y clang-${{matrix.cxx}} libc++abi-${{matrix.cxx}}-dev libc++-${{matrix.cxx}}-dev lld-${{matrix.cxx}}
           python3 -m pip install meson ninja
 
       - name: Sanity Checks
         env:
           CXX: clang++-${{matrix.cxx}}
           CXXFLAGS: -stdlib=libc++
+          CXX_LD: lld-${{matrix.cxx}}
         run: |
           meson setup "${{github.workspace}}/build" --wrap-mode=${{matrix.deps}} -Ddefault_library=${{matrix.type}} -Dwarning_level=3 -Dcpp_std=c++20
           meson compile -C "${{github.workspace}}/build" --verbose