Coverage; cppunit header not found when running coverage script

Author: danmar

.github/workflows/coverage.yml

@@ -18,6 +18,7 @@ jobs:
           sudo apt-get install libxml2-utils
           sudo apt-get install libz3-dev libz3-4
           sudo apt-get install lcov
+          sudo apt-get install libcppunit-dev
           pip install lcov_cobertura
 
       - name: Compile instrumented