github: Skip dependencies (libxml2, terminfo) in linux builds that have little value in our context

The fewer dynamic library dependencies we have, the easier it is
to run the binaries on other linux distributions than the one it
was built on.

In the docker based releases, these libraries haven't been installed
and thus haven't been used so far.

The docker based releases haven't linked against zlib though, but
keep linking against that, since that should have a quite stable
ABI and not cause much binary compatibility issues.

.github/workflows/build.yml

@@ -59,7 +59,10 @@ jobs:
           TAG: ${{needs.prepare.outputs.TAG}}
         run: |
           sudo apt-get update && sudo apt-get install ninja-build
-          ./build-all.sh $(pwd)/install/llvm-mingw --disable-clang-tools-extra --disable-lldb
+          # Skip dynamic library dependencies that might make it harder to
+          # run the binaries on other distros (and that have little use within
+          # llvm-mingw).
+          LLVM_CMAKEFLAGS="-DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_TERMINFO=OFF" ./build-all.sh $(pwd)/install/llvm-mingw --disable-clang-tools-extra --disable-lldb
           .github/workflows/store-version.sh install/llvm-mingw/versions.txt
           cd install
           DISTRO=ubuntu-$(grep DISTRIB_RELEASE /etc/lsb-release | cut -f 2 -d =)-$(uname -m)
@@ -92,7 +95,10 @@ jobs:
           MINGW_W64_VERSION: ${{needs.prepare.outputs.MINGW_W64_VERSION}}
         run: |
           sudo apt-get update && sudo apt-get install ninja-build
-          ./build-all.sh $(pwd)/install/llvm-mingw --disable-clang-tools-extra --disable-lldb --enable-asserts
+          # Skip dynamic library dependencies that might make it harder to
+          # run the binaries on other distros (and that have little use within
+          # llvm-mingw).
+          LLVM_CMAKEFLAGS="-DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_TERMINFO=OFF" ./build-all.sh $(pwd)/install/llvm-mingw --disable-clang-tools-extra --disable-lldb --enable-asserts
           .github/workflows/store-version.sh install/llvm-mingw/versions.txt
           cd install
           tar -Jcf ../llvm-mingw-linux.tar.xz llvm-mingw