[GCC-XML] Have GCCXML judge pointers to be 64-bit

[Tony]

Hi,

First off, thanks for GCCXML - it is an excellent tool and I am quite
happy with it. Second, I'm a bit gcc-ignorant, so this may more be a
gcc question than a gccxml question.

So I'm finally migrating some of my work to 64-bit, and I found that
all PointerType's in GCCXML are 32-bit with my naiive settings.

How can I get them to be size="64"? and of course respect the other
usual suspects such as size_t?

Thanks!

// tony