gitlab-ci: print git-status during do_clean() in "run-test.sh"

If we have a non-clean working directory after do_clean(), that
is a bug and something we need to investigate. Print information
to make that easier to debug.

.gitlab-ci/run-test.sh

@@ -23,6 +23,9 @@ do_clean() {
     # "make -C update-po", run on "make dist" has a silly habit of
     # modifying files in-tree. Lets undo that.
     git checkout -- po/
+
+    git status
+    git diff
 }
 
 uname -a