[MiNT] mshort support

[Vincent Rivière <vincent.riviere@freesbee.fr>]

Hello.

I'm currently compiling FreeMiNT and all its modules (including XaAES) for 
the first time (and I'm really frightened by the number of warnings).

It seems that the kernel and all its modules are compiled with -mshort, am I 
right ?
In this case, all the libraries used by FreeMiNT and its modules must be 
provided with -mshort, for all supported CPUs. This includes at least libgcc 
and libgem.

Severe problems can appear when mixing libraries compiled with different 
short/CPU options.

If the above is right, I will include all the required mshort libraries in 
my future cross-compiler distributions.

--
Vincent Rivière