Python wrapping: remove the "build" directory when cleaning,

and the ".dep" files when distcleaning.

--HG--
extra : convert_revision : svn%3Aeff31bef-be4a-0410-a8fe-e47997df2690/trunk%40115

python/Makefile

@@ -46,7 +46,8 @@ test:	setup
 .PHONY: clean
 clean:
 	-rm tstools/*.so
+	-rm -rf build/
 
 .PHONY: distclean
 distclean: clean
-	-rm tstools/*.c
+	-rm tstools/*.c tstools/*.dep