Add musl x86-64 target to releases

Author: GeorgeHahn

.github/workflows/release.yml

@@ -44,6 +44,12 @@ jobs:
           - target: x86_64-unknown-linux-gnu
             os: ubuntu-latest
 
+          # Musl x86-64 Linux build. Assume librdkafka needs cc/cxx.
+          - target: x86_64-unknown-linux-musl
+            os: ubuntu-latest
+            cc: 'musl-gcc'
+            cxx: 'explicitly-unset'
+
           # Normal Intel Mac build
           - target: x86_64-apple-darwin
             os: macos-latest
@@ -71,6 +77,11 @@ jobs:
           target: ${{ matrix.target }}
         if: matrix.target == 'aarch64-unknown-linux-gnu'
 
+      # Install musl tools for musl builds
+      - name: Install musl tools
+        run: sudo apt-get update && sudo apt-get install -y musl-tools
+        if: matrix.target == 'x86_64-unknown-linux-musl'
+
       # Install the protobuf compiler for linux builds
       - name: Install protobuf (Apt)
         run: sudo apt-get update && sudo apt-get install -y protobuf-compiler