libstd refactored.

[Ori Bernstein <ori@xxxxxxxxxxxxxx>]

As of today, libstd has been split into two libraries:

libsys:

    This library contains all of the system calls, and most
    of the system dependent data structures. It should, in
    principle, export all features that a system supports.

libstd:

    This library is a portable set of "lowest common denomiator"
    routines. Anything using it should be able to compile without
    changes on any supported platform.

Making this change involved fixing a compiler bug, which changed
the format of usefiles. You will have to 'make clean' and then
'make install' for all Myrddin sources to avoid mysterious errors
or compiler crashes.

Thank you and have a nice day.

-- 
    Ori Bernstein