i370 port

[Paul Edwards]

Still making great progress.

The process is being simplified.

I have a question.  I need to remap long names to short, and I
wish to use #defines to do this as it is portable.

So I have a whole lot of:

#define align_functions ZZZ_1
#define align_functions_log ZZZ_2

etc

and I have put them all into an mshort.h for convenience.

Now all code needs to be exposed to this.  ie libiberty and
gcc.  To fit in with the new style of building, I basically want
to update ansidecl.h to do a:

#ifdef PUREISO
#include "mshort.h"
#endif

Does that seem reasonable?

Actually I also need to #include "unixio.h" to include various
types that must be present, st_ino or whatever too.

I may have other miscellaneous defines as well.  I'm still in
the process of unwinding all the hacks I put in years ago.  :-)

Thanks.  Paul.