[CFT] Fixes from illumos

[Pedro Giffuni]

Hello;

I am trying to put together the last two patches that we need to be
(mostly) up to date with illumos.

This "svn diff" patch brings back the rest of a somewhat elusive
revision 249367 that gave us trouble before and had to be
reverted:

http://people.freebsd.org/~pfg/patches/dtrace/libdtrace-r249367.diff

It should take care of the following issues:

3022 DTrace: keys should not affect the sort order when sorting by value
3023 it should be possible to dereference dynamic variables
3024 D integer narrowing needs some work

Ignore the attempts to get repo copies of the tests when applying the
patch but do report any regression or secondary issue it may cause.

After this, I would like to re-apply r249429, which should cover most
of the remaining changes from Illumos. Still pending for review are
some changes for Solaris zones support that very probably don't
apply to our codebase at all.

Thank you,

Pedro.