Introduce another exception for GCC 8 test

We will have to drop most likely the support for GCC 8 when moving to CMake.

tools/docker/scripts/build_cp2k_cmake.sh

@@ -19,13 +19,13 @@ source ./cmake/cmake_cp2k.sh "${PROFILE}" "${VERSION}"
 # Compile CP2K
 echo -en '\nCompiling CP2K ... '
 if ninja --verbose &> ninja.log; then
-  echo "done."
+  echo "done"
 else
   echo -e "failed.\n\n"
   tail -n 100 ninja.log
   mkdir -p /workspace/artifacts/
   cp ninja.log /workspace/artifacts/
-  echo -e "\nSummary: Compilation failed."
+  echo -e "\nSummary: Compilation failed"
   echo -e "Status: FAILED\n"
   exit 1
 fi