* bfd.c, Makefile.in: added tekhex
* aoutx.h (set_section_contents): pages should be padded to the
size of a page, not the size of a segment.
* configure.in: added go32 host and i386-aout target.
* i386aout.c, libaout.h: now works for go32 target
* ieee.c: fix bit rot.
* seclet.c: support for padding seclet type.