Try tweaking Alpine test runner for wasm-ld

Author: QuantumSegfault

.github/workflows/main.yml

@@ -174,7 +174,8 @@ jobs:
             # create ../llvm symlink to distro LLVM (no prebuilt LDC-LLVM for musl)
             ln -s /usr/lib/llvm21 $(dirname $(pwd))/llvm
             ../llvm/bin/llvm-config --version
-
+            # link wasm-ld into $PATH
+            ln -sf $PWD/../llvm/bin/wasm-ld /usr/${{ matrix.arch }}-alpine-linux-musl/bin/wasm-ld
             # see https://github.com/actions/runner/issues/801#issuecomment-2976165281
             if [[ '${{ matrix.arch }}' == aarch64 ]]; then
               sed -i "/^ID=/s/alpine/NotpineForGHA/" /etc/os-release