New port m32r-linux

[Doug Evans]

Eric Christopher writes:
 > > Using that as boilerplate seems like a good first step.
 > > Certainly I wouldn't just cut-n-paste the entire thing over,
 > > just use it as a guide.
 > 
 > God no. It's a mess :)

Perhaps.  But reading the files in question, I wouldn't find it
hard to skim over the clutter.
And the mips has some commonality with the m32r, e.g. hi16/lo16 handling.
[since I used the mips hi16/lo16 support to implement m32r's hi16/lo16,
that's not surprising :-)]