tools/docker: add ld.lld to env

We use the env container to update kernel configs and the lack of ld.lld
in it prevents the usage of LLVM=1.

Author: a-nogikh

tools/docker/env/Dockerfile

@@ -92,12 +92,13 @@ RUN apt-get install -y -q gnupg software-properties-common apt-transport-https
 RUN curl https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
 RUN add-apt-repository "deb http://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-15 main"
 RUN apt-get update --allow-releaseinfo-change
-RUN apt-get install -y -q --no-install-recommends clang-15 clang-format-15 clang-tidy-15
+RUN apt-get install -y -q --no-install-recommends clang-15 clang-format-15 clang-tidy-15 lld-15
 RUN apt-get install -y -q --no-install-recommends flatbuffers-compiler
 RUN sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-15 100
 RUN sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 100
 RUN sudo update-alternatives --install /usr/bin/clang-tidy clang-tidy /usr/bin/clang-tidy-15 100
 RUN sudo update-alternatives --install /usr/bin/clang-format clang-format /usr/bin/clang-format-15 100
+RUN sudo update-alternatives --install /usr/bin/ld.lld ld.lld /usr/bin/lld-15 100
 RUN apt autoremove -y -q
 
 # Install the Spanner emulator.