ci: add x86_64-linux-musl release

Author: TerrorJack

.github/workflows/musl.yml

@@ -0,0 +1,70 @@
+name: wasmtime-linux-musl
+
+on:
+  push:
+    tags:
+      - "*"
+
+jobs:
+  wasmtime-linux-musl:
+    name: wasmtime-x86_64-linux-musl
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: build-image
+        run: |
+          pushd "$(mktemp -d)"
+          curl -f -L --retry 5 https://github.com/type-dance/rust-alpine-mimalloc/archive/refs/heads/master.tar.gz | tar xz --strip-components=1
+          podman build \
+            --network host \
+            --pull \
+            --squash \
+            --tag rust:alpine-mimalloc \
+            .
+          popd
+
+      - name: checkout
+        uses: actions/checkout@v3
+        with:
+          submodules: true
+
+      - name: build-wasmtime
+        run: |
+          podman run \
+            --init \
+            --network host \
+            --rm \
+            --tmpfs /tmp:exec \
+            --volume $PWD:/workspace \
+            --workdir /workspace \
+            rust:alpine-mimalloc \
+            cargo build \
+            --release \
+            --bin wasmtime \
+            --all-features \
+            --config 'profile.release.lto = "thin"' \
+            --config 'profile.release.strip = "symbols"'
+
+      - name: test-wasmtime
+        run: |
+          target/release/wasmtime --version
+          ldd target/release/wasmtime
+
+      - name: package-wasmtime
+        run: |
+          mkdir wasmtime-v12.0.1-x86_64-linux-musl
+          mv target/release/wasmtime wasmtime-v12.0.1-x86_64-linux-musl
+          XZ_OPT="-T0 -9" \
+            tar \
+            --sort=name \
+            --mtime=1970-01-01T00:00:00Z \
+            --owner=0 \
+            --group=0 \
+            --numeric-owner \
+            -cJf wasmtime-v12.0.1-x86_64-linux-musl.tar.xz wasmtime-v12.0.1-x86_64-linux-musl
+
+      - name: upload-artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: wasmtime-x86_64-linux-musl
+          path: wasmtime-v12.0.1-x86_64-linux-musl.tar.xz