Accept non-zero exit codes from pycodestyle

Signed-off-by: Niels Thykier <niels@thykier.net>

ci/gitlab-ci-runner

@@ -22,7 +22,7 @@ if [ $err = 0 ] && [ "x$1" = "x--with-coverage" ]; then
     echo
     python3-coverage html -d coverage
     mkdir codestyle
-    pycodestyle --config=setup.cfg britney.py  britney2  --show-source --count > codestyle/codestyle.txt
+    pycodestyle --config=setup.cfg britney.py  britney2  --show-source --count > codestyle/codestyle.txt || :
 fi
 
 exit $err