Fix dependency installation for i386

Author: TheAssassin

.github/workflows/main.yml

@@ -25,5 +25,9 @@ jobs:
       - name: Install dependencies
         run: sudo pip3 install gcovr
 
+      - name: Install multiarch dependencies
+        if: matrix.ARCH == "i386"
+        run: sudo apt install -y gcc-multilib g++-multilib
+
       - name: Test coverage
         run: bash -ex ci/test-coverage.sh