CI: run 07-simulation-base in CI

This adds a basic sanity check of
Cooja functionality for ContikiMoteTypes.

.github/workflows/build.yml

@@ -26,3 +26,20 @@ jobs:
         with:
           gradle-version: 8.3
           arguments: test
+
+      - name: Checkout Contiki-NG repo
+        uses: actions/checkout@v3
+        with:
+          repository: contiki-ng/contiki-ng
+          path: ../contiki-ng
+
+      - name: Run Contiki-NG simulation tests
+        run: |
+          rm -rf ../contiki-ng/tools/cooja
+          (cd ../contiki-ng/tools && ln -s . `pwd`)
+          ls -l ../contiki-ng/tools
+          cd ../contiki-ng/tests/07-simulation-base
+          # Skip MSP430 tests, no compiler installed.
+          rm ??-*sky*.csc ??-*z1*.csc
+          source ../../tools/docker/files/bash_aliases
+          cimake