Win64 raw api

[Devin A Nakamura]

Is there any particular logic for having the raw api disabled on win64
builds? From what I can tell of the source the raw api stub functions
should allow the api calls to work even when they are not natively
implemented. Also I noticed that in master the raw api is enabled. Is 
there
any logic behind this (ie was some new functionality added to support 
this)
or was it just fixing a logic error in the previous version of
x86/ffitarget.h?