[Toybox] Toybox version?

[scsijon]

I was wondering how much trouble it would be to add a -v or --version to 
toybox with the version specs?

Not having updated it on my boxes or built it for a while I went to see 
what build I had installed, but it wouldn't respond, all it gave me was 
a list of internal commands or the --help message, neither with any 
build specs.

While i'm thinking about it, it might also be nice if it could say what 
it had been built for, i.e. toybox-i486.

thanks

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