Adjust CI to use cross-build script

.github/workflows/rust.yml

@@ -40,13 +40,8 @@ jobs:
     - name: Install extra packages
       run: |
         sudo apt-get update && sudo apt-get install -y libatk1.0-dev libcairo2-dev libpango1.0-dev libgdk-pixbuf2.0-dev libgtk-3-dev python3-pip tftp
-        cargo install cargo-zigbuild
-        sudo pip3 install ziglang
+        cargo install cross --git https://github.com/cross-rs/cross
 
-    - name: Build for Linux x86_64 Headless
+    - name: Build all targets
       continue-on-error: false
-      run: cargo zigbuild --release --no-default-features
-
-    - name: Build for Linux x86_64
-      continue-on-error: false
-      run: cargo zigbuild --release
+      run: ./cross-build-all.sh