po/LINGUAS revisited

["Matthias Clasen" <matthias clasen gmail com>]

I tried to get Gnome 2.15.1 into rawhide today, but mostly failed.
Many of the 2.15.1 tarballs

a) contain no translations at all
b) require a cvs  version of intltool

this may not affect English-speaking jhbuild users much, but
it pretty much precludes packaging 2.15, thus reducing the
test base considerably. Can we please try to ensure for
2.15.2 that

a) configure scripts do not depend on unreleased tool versions
b) make sure that tarballs contain translations

Thank  Matthias Clasen