[commit/sim] Add `sim_complete_command' definition to erc32 sim

[Joel Brobecker]

> i didnt build test it because i couldnt figure out how to even configure for 
> the target.  i still dont ;).
> 
> $ ./configure --target=erc32-elf
> checking target system type... Invalid configuration `erc32-elf': machine 
> `erc32' not recognized
> configure: error: /bin/sh ../../config.sub erc32-elf failed

I wish we could add erc32-elf. Right now, the target is sparc-elf.
I haven't done it because tools like config.sub don't support it yet.
We could work on that, if it made sense.

-- 
Joel