It now no longer unhelpfully fails because it cannot run foreign
binaries during the configuration phase. Instead, the configuration
values necessary are read from cross.config in this case. (This just
codifies present defaults and adds sensible ones where they were still
missing). Alternative files can be specified using the
`--with-cross-compilation-info=' switch.
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@35449 72102866-910b-0410-8b05-ffd578937521