Python examples makefiles clean target fixed and use RUNPIPE and tidyup

Examples/python/java/Makefile

@@ -5,20 +5,18 @@ TARGET     = example
 INTERFACE  = example.i
 LIBS       = -lm
 
-all:: Example.class
+check: build
+
+build: Example.class
 	$(MAKE) -f $(TOP)/Makefile CXXSRCS='$(CXXSRCS)' SWIG='$(SWIG)' \
 	TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' CXX="gcj"  \
 	CXXSHARED="gcj -fpic -shared Example.class" DEFS='' LIBS="-lstdc++" python_cpp
 
-
-clean::
+clean:
 	$(MAKE) -f $(TOP)/Makefile python_clean
 	rm -f $(TARGET).py
 	rm -f *.class Example.h
 
-check: all
-
-
 Example.class: Example.java
 	gcj -fPIC -C -c -g Example.java
 	gcjh  Example