purge envhelp/output on distclean to get rid of stale path errors upon branch switches etc.

git-svn-id: svn+ssh://svn.code.sf.net/p/migrid/code/trunk@6113 b75ad72c-e7d7-11dd-a971-7dbc132099af

Author: jonasbardino

Makefile

@@ -36,6 +36,7 @@ clean:
 .PHONY: distclean
 distclean: clean
 	@rm -rf ./envhelp/venv
+	@rm -rf ./envhelp/output
 	@rm -rf ./tests/__pycache__
 	@rm -f ./tests/*.pyc