github: Add binary kernel binary build and upload

Signed-off-by: Rob Bradford <rbradford@rivosinc.com>

.github/workflows/release.yaml

@@ -0,0 +1,48 @@
+name: Cloud Hypervisor Linux Release
+on: [create, push]
+
+jobs:
+  release:
+    #if: github.event_name == 'create' && github.event.ref_type == 'tag'
+    name: Release
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Code checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install build tools
+        run: sudo apt install build-essential flex bison libssl-dev libelf-dev bc
+      - name: Download config
+        run: curl https://raw.githubusercontent.com/cloud-hypervisor/cloud-hypervisor/main/resources/linux-config-x86_64 -o .config
+      - name: Build kernel
+        run: CFLAGS="-Wa,-mx86-used-note=no" make bzImage -j `nproc`
+      - name: Create release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
+          draft: true
+#      - name: Upload bzImage for x86_64
+#        id: upload-release-hypervisor-fw
+#        uses: actions/upload-release-asset@v1
+#        env:
+#          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+#        with:
+#          upload_url: ${{ steps.create_release.outputs.upload_url }}
+#          asset_path: arch/x86/boot/bzImage
+#          asset_name: bzImage
+#          asset_content_type: application/octet-stream
+#      - name: Upload vmlinux for x86_64
+#        id: upload-release-hypervisor-fw
+#        uses: actions/upload-release-asset@v1
+#        env:
+#          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+#        with:
+#          upload_url: ${{ steps.create_release.outputs.upload_url }}
+#          asset_path: vmlinux
+#          asset_name: vmlinux
+#          asset_content_type: application/octet-stream