Bring back i686-pc-windows-gnullvm target

Author: mati865

src/ci/github-actions/jobs.yml

@@ -686,8 +686,10 @@ auto:
   - name: dist-aarch64-llvm-mingw
     env:
       SCRIPT: python x.py dist bootstrap --include-default-paths
+      # i686 has no dedicated job, build it here because this job is fast
       RUST_CONFIGURE_ARGS: >-
         --build=aarch64-pc-windows-gnullvm
+        --target=aarch64-pc-windows-gnullvm,i686-pc-windows-gnullvm
         --enable-full-tools
         --enable-profiler
       DIST_REQUIRE_ALL_TOOLS: 1

src/ci/scripts/install-mingw.sh

@@ -16,7 +16,6 @@ if isWindows && isKnownToBeMingwBuild; then
         *aarch64-llvm*)
             mingw_dir="clangarm64"
             mingw_archive="${LLVM_MINGW_ARCHIVE_AARCH64}"
-            arch="aarch64"
             # Rustup defaults to AArch64 MSVC which has a hard time building Ring crate
             # for citool. MSVC jobs install special Clang build to solve that, but here
             # it would be an overkill. So we just use toolchain that doesn't have this
@@ -26,7 +25,6 @@ if isWindows && isKnownToBeMingwBuild; then
         *x86_64-llvm*)
             mingw_dir="clang64"
             mingw_archive="${LLVM_MINGW_ARCHIVE_X86_64}"
-            arch="x86_64"
             ;;
         *i686*)
             mingw_dir="mingw32"
@@ -64,7 +62,9 @@ if isWindows && isKnownToBeMingwBuild; then
             mv llvm-mingw-20251104-ucrt-$arch $mingw_dir
             # Temporary workaround: https://github.com/mstorsjo/llvm-mingw/issues/493
             mkdir -p $mingw_dir/bin
-            ln -s $arch-w64-windows-gnu.cfg $mingw_dir/bin/$arch-pc-windows-gnu.cfg
+            for arch in aarch64 i686 x86_64; do
+                ln -s $arch-w64-windows-gnu.cfg $mingw_dir/bin/$arch-pc-windows-gnu.cfg
+            done
             ;;
         *)
             echo "Unrecognized archive type"