Build the Autobahn examples upfront

.github/workflows/ci.yml

@@ -96,6 +96,12 @@ jobs:
           sudo apt-get install python-unittest2
           sudo pip install urllib3[secure] autobahntestsuite
 
+      - name: Build Autobahn TestSuite for client
+        run: cargo build --release --features async-std-runtime --example autobahn-client
+
+      - name: Build Autobahn TestSuite for server
+        run: cargo build --release --features async-std-runtime --example autobahn-server
+
       - name: Running Autobahn TestSuite for client
         run: ./scripts/autobahn-client.sh