[Xcb] More pthread stubs.

[M Joonas Pihlaja]

On Mon, 3 May 2010, Julien Danjou wrote:

> Whenever that list or template is changed (e.g. during developement),
> typing 'make' should rebuild stubs.c.

If list.m4 is changed then the HAVE_<function> defines need to be 
updated.  Those are generated by configure.ac, so it's necessary to 
reconfigure if the list changes.

Cheers,

Joonas