Python examples makefiles clean target fixed and use RUNPIPE and tidyup

Examples/python/performance/Makefile

@@ -1,10 +1,4 @@
-ifeq (,$(PY3))
-  PYSCRIPT = runme.py
-else
-  PYSCRIPT = runme3.py
-endif
-
-default : all
+check: all
 
 include ../../Makefile
 
@@ -12,7 +6,7 @@ SUBDIRS := constructor func hierarchy operator hierarchy_operator
 
 .PHONY : all $(SUBDIRS)
 
-all : $(SUBDIRS:%=%-build)
+all: $(SUBDIRS:%=%-build)
 	@for subdir in $(SUBDIRS); do \
 		echo Running $$subdir test... ; \
 		echo -------------------------------------------------------------------------------- ; \
@@ -21,17 +15,17 @@ all : $(SUBDIRS:%=%-build)
 		cd ..; \
 	done
 
-$(SUBDIRS) :
+$(SUBDIRS):
 	$(MAKE) -C $@
 	@echo Running $$subdir test...
 	@echo --------------------------------------------------------------------------------
 	cd $@ && env LD_LIBRARY_PATH=.:$$LD_LIBRARY_PATH PYTHONPATH=$(srcdir):$$PYTHONPATH $(PYTHON) $(PYSCRIPT)
 
-%-build :
+%-build:
 	$(MAKE) -C $*
 
-%-clean :
+%-clean:
 	$(MAKE) -s -C $* clean
 
-clean : $(SUBDIRS:%=%-clean)
+clean: $(SUBDIRS:%=%-clean)
 	rm -f *.pyc