gnutls 3.0.4 and mingw-w64 build issues

[Hoyt, David]

> Ah ok... Because it is cross build the detection didn't work properly 
> and you were trying to compile the 32-bit version of the files. Can you 
> try the --host x86_64 configure option?

It's sort of a cross build. It's a 64-bit host OS, but I'm running all the build tools in 32-bit mode (Windows-on-Windows, WOW), so everything should appear to be 32-bit and there shouldn't be any distinction.

I'll retry with the --host option, however, as soon as possible and let you know the results.

With what I had, configure gives me the following output:

 version:          3.0.4 shared 30:0:2
 Host type:        i686-pc-mingw32
 Install prefix:   ~/native/staging
 Compiler:         gcc -mtune=i686 -mthreads -std=gnu99
 [...]

Host type *should* be, I believe, "i686-w64-mingw32" and that may be what's leading to the problems I'm seeing w/ the assembly.

> I've added more -Ibuilddir stuff. I wonder why srcdir is not enough in 
> this build.

I believe it's because I don't build inside the source directory and gnulib generates some headers, but they're generated in the build dir and not the source dir (which sounds correct to me).