add compile-python to sys tests

tests/sys/compile-python.hxml

@@ -0,0 +1,2 @@
+compile-each.hxml
+-python bin/python/sys.py

tests/sys/compile.hxml

@@ -1 +1,2 @@
-compile-neko.hxml
+--next compile-neko.hxml
+--next compile-python.hxml