GitLab-CI: display environmental variables for Debian-CI [Linux]

.gitlab-ci.yml

@@ -14,6 +14,7 @@ native_Debian_clang:
     - clang --version
   stage: build
   script: &native_scr
+    - env
     - mkdir build
     - cd build
     - time cmake .. -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DBA_PY_PACKAGE=ON -DCMAKE_PREFIX_PATH=$QCMAKE -DZERO_TOLERANCE=ON