m32c support contribution

[DJ Delorie]

> Thanks DJ.  The patch has been applied.

Thanks!

> Regarding chip maintainers, feel free to add a new section to the 
> MAINTAINERS file with yourself as the maintainer for m32c.  You may make 
> m32-specific changes without permission.  Any changes that affect shared 
> files are write-after-approval.

In GCC-land, cpu-specific parts of the build system (configure,
Makefile, etc) are considered the domain of the cpu maintainers, even
though the files themselves are shared.  Would you like to use the
same convention for newlib?