Pending fixes for LuaJIT and Coco

[Mike Pall <mikelu-0606@...>]

Hi,

I'm planning to release minor upgrades to LuaJIT and Coco
tomorrow. Other than being based on Lua 5.1.1, there are
no major changes.

Here's a list of the minor changes:

* C stacks are deallocated early: when a coroutine ends, and
  not when the coroutine object is collected. This mainly
  benefits Windows Fibers.

* Windows threads get the required Fiber context when resuming
  a coroutine and not just on creation.

* Enforce (dynamic) linker error for EXE/DLL version mismatches.

If you've found (but not reported) any other issues in
LuaJIT 1.1.0 or Coco 1.1.0, please speak up now. Thank you!

Bye,
     Mike