tools/python: Improve .gitignore and clean Makefile rule

Ignore all intermediate python files, and use find in the clean rule as there
are no Makefiles in subdirectories to participate in a recursive clean.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
CC: Ian Campbell <Ian.Campbell@citrix.com>
CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

tools/python/Makefile

@@ -29,10 +29,8 @@ test:
 
 .PHONY: clean
 clean:
-	rm -f $(XENPATH)
-	rm -rf build/ *.pyc *.pyo *.o *.a *~ xen/util/auxbin.pyc
-	rm -f xen/lowlevel/xl/_pyxl_types.h
-	rm -f xen/lowlevel/xl/_pyxl_types.c
-	rm -f $(DEPS)
+	find . \( -name "*.py[ocd]" -o -name "*~" -o -name "_*.[hc]" \) -delete
+	rm -rf build/
+	rm -f $(XENPATH) $(DEPS)
 
 -include $(DEPS)