execshield inspection needed

[Kyle McMartin]

x86-merge has kind of thrown a spanner in the execshield patchset. I've
merged it up so it looks like it works, but I'd like to get some input
from others to make sure I didn't brown-paper-bag it.

The randomization bits seem to have been merged upstream, but I deferred
to the execshield implementation since they had some differences.

cheers,
	Kyle
[linux-2.6-execshield.patch is attached.]