fix: install g++ and libc6-dev for ARM64 cross-compilation

Author: Slach

.github/workflows/build-gateway.yml

@@ -37,7 +37,7 @@ jobs:
     - name: Install cross-compilation tools
       run: |
         sudo apt-get update
-        sudo apt-get install -y gcc-aarch64-linux-gnu
+        sudo apt-get install -y gcc-aarch64-linux-gnu g++-aarch64-linux-gnu libc6-dev-arm64-cross
 
     - name: Build binary for ${{ matrix.platform }}
       run: |