fixup canadian cross logic with in toplevel configure.in

[Mike Frysinger]

On Monday 10 April 2006 22:53, Daniel Jacobowitz wrote:
> On Mon, Apr 10, 2006 at 10:43:43PM -0400, Mike Frysinger wrote:
> > unless i'm mistaken, canadian cross is when $build != $host ... if that's
> > the case, then the top level configure.in has a small typo where it tests
> > for $build = $host instead of $build != $host
>
> This is incorrect; please reread the comment above the if condition,
> and compare to what it's doing.  The body is suppressed for build !=
> host, because it points to binaries for host.

indeed ... my original readings of the comments focused more on the last part 
where i inverted the idea in my head ... oh well

related note (and what prompted me to look at this code in the first place), 
the usage of -B$(build_tooldir)/lib in FLAGS_FOR_TARGET is multilib safe ?  
seems like the other portions of gcc which insert -B flags (like 
GCC_FOR_TARGET) take care in letting gcc itself generate the proper paths 
rather than hardcoding the '/lib' subpath
-mike