SVGHMI: add support of all IEC61131 interger types.

- add HMI_*INT types
- fix sprintf.js with big int (64b)
- extend svghmi_real test project

<?xml version='1.0' encoding='utf-8'?>
<BaseParams xmlns:xsd="http://www.w3.org/2001/XMLSchema" IEC_Channel="2" Name="py_ext_0"/>