loadfile.h contains macros that are supposed to be MD, but loadfile.c is now MI.
Fixes:
- a.out support
- pass information values via an array not global variables
- don't assume that you can access memory directly.
- remove MD parts
- remove some printfs.
XXX: loadfile.c needs to be moved somewhere where other ports can use it.
XXX2: read() routines on the i386 don't appear to set errno on failure.