[phobos] 64-bit

[Walter Bright]

Sean Kelly wrote:
>
> I put versions and conditionals in when I created those that should support 64-bit.  All that should be required is possibly some fiddling with core.sys.posix.config and possibly core.stdc.config.  The headers obviously haven't been tested as thoroughly in a 64-bit environment though, so it's possible I screwed something up and we just don't know it yet.  The asm in core.atomic should support 64-bit as well.  I haven't take care of core.thread yet though.
>
>   

Great!