PATCH, v3: eliminate another configure error

[Benjamin Kosnik]

> 2009-01-02  Ben Elliston  <bje@au.ibm.com>
> 
>         * configure.ac (GLIBCXX_CHECK_STANDARD_LAYOUT): Remove
> invocation.
>         * configure: Regenerate.

Ouch. Thanks for finding this: I've checked it in for you.

best,
benjamin