upgrade Jenkins setuptools

Author: mr-c

Makefile

@@ -175,6 +175,7 @@ mypy: ${PYSOURCES}
 jenkins:
 	if ! test -d env ; then virtualenv env ; fi
 	. env/bin/activate ; \
+	pip install -U setuptools pip wheel ; \
 	${MAKE} install-dep coverage.html coverage.xml pep257_report.txt \
 		sloccount.sc pep8_report.txt pylint_report.txt
 	if ! test -d env3 ; then virtualenv -p python3 env3 ; fi