Proposed elf header changes which affect PPC and ARM

[John Birrell]

The patch: <http://people.freebsd.org/~jb/elf.patch> moves
all the relocation definitions for each arch from the machine/elf.h
header to sys/elf_common.h.

This will allow DTrace running hosted on one FreeBSD arch connect
to a target FreeBSD arch to trace it. Although this isn't functionality
that Sun has in OpenSolaris, FreeBSD needs to support embedded
targets.

I have tested all the arches define in 'make universe', but it seems
that PPC and ARM aren't up to that stage yet.

Note that this patch also contains the extra things that Sun has added
to their ELF format.

I doubt this patch will cause any problems on either PPC or ARM.

Any problems?

--
John Birrell