* Remove SYSTEM (only use PLATFORM) * Add HAS_PYTHON HAS_JAVA HAS_DOTNET * move Makefile.unix|win.mk into Makefile.port.mk * fix make CI
* Remove SYSTEM (only use PLATFORM) * Add HAS_PYTHON HAS_JAVA HAS_DOTNET * move Makefile.unix|win.mk into Makefile.port.mk * fix make CI