1. modify each dirver's INIT_EXPORT micro.
2. modify the lwip parameters' in rtconfig.h
3. insert keep section .rti_fn* in IAR link file
4. change part id from TM4C129XNCZAD to TM4C1294NCPDT

[bsp] modify the uart_driver to fit the new rt-thread serial device driver framework. Modify the template.uvproj for auto generate MDK project.