Cannot bootstrap libstdc++ on trunk

[Benjamin Kosnik]

> I do not understand why for a successful build of the current
> libstdc++ library the msgfmt command is required when gcc is configured
> with the --disable-nls option.

> --host=i686-pc-linux-gnu --enable-shared --enable-threads=posix
> --enable-languages=c,c++,f77,objc --disable-nls --enable-clocale=gnu

because of --enable-clocale=gnu, msgfmt is needed. there are no sanity 
checks on this configure option at the moment: if you select it and 
gettext functionality is missing, you bomb out.

-benjamin