Add code generator for TR3200 CPU
Add code generator for TR3200 CPU

Basic info:
- TR3200 is similar in spirit to MIPS
- generated asm code is for VASM (by Volker Barthelmann)
- cdecl calling convention implemented
- this is an initial version

Links:

VASM:
http://sun.hasenbraten.de/vasm/
https://github.com/Zardoz89/VASM

TR3200 CPU spec:

https://github.com/trillek-team/trillek-computer/blob/master/cpu/TR3200.md

Calling conventions for TR3200 CPU:
https://gist.github.com/Zardoz89/2867cef12f0244b78c3a

JianpingZeng/SmallerC,gdos/SmallerC,JianpingZeng/SmallerC,gdos/SmallerC