initial empty check-in
First version of a NetBSD-Amiga bootblock compilable from within NetBSD,
along with toolchain enhancements.

aout2bb transforms a.out files with reloc information into bootblock format
files with a compressed relocation info.

bbstart.s relocates the bootblock using this compressed info, before jumping
to C code.

txlt changes some more of the absolute references to pc-relative ones (we know
we have a single code + data address space).

If you ever try to change this: don't even dare to change the compiler options;
they were found in weeks of trial and error as the ones producing the smallest
(not necessarily fastests) code.

installboot is just a script around dd, for now.

Some ideas by Michael Hitch, Leo Weppelman and Jason Thorpe; bugs added
by myself.
ignatios' tool to build bootable sparc/sun3 cdroms.