Move across modules fixes (#488)
Move across modules fixes (#488)

* Remove an overly strict DCHECK_LE that actually isn't necessary, as the subsequent code is sufficiently defensive.

* Fixes related to utilities to move code across modules

* This should fix a bunch of things in the move/clone functions.
trailofbits/remill,trailofbits/remill,trailofbits/remill,trailofbits/remill