[patch] Fix a couple of libstdc++ failures on uclinux

[Kazu Hirata]

Hi Mark,

> It doesn't look like this patch was ever applied.  Paolo C. suggested
> that you use the correct autoconf to regenerate, and Benjamin seemed
> generally pleased with the approach.  Would you care to resubmit to
> address Paolo C.'s comments?

Sure.

Kazu Hirata