CI: debug geant4 job

.gitlab-ci.yml

@@ -125,6 +125,8 @@ variables:
     - cd Geant4-build
     - ls;
     - ls ../
+    - ls ../install
+    - ls ../install/xerces-c-${XERCESC_VERSION}/
     - cmake ${CMAKE_ARGS} -DGEANT4_INSTALL_DATA=ON -DGEANT4_USE_GDML=ON -DGEANT4_BUILD_MULTITHREADED=ON -DXERCESC_ROOT_DIR=../install/xerces-c-${XERCESC_VERSION}/ ../geant4 -DGEANT4_USE_SYSTEM_EXPAT=OFF
     - make -j4
     - make install