Log Message:
Update libFoundation to 1.1.7.168.  This makes libFoundation play nice with
the new gnustep-make directory structure.  Other notable changes include:
 * bugfixes and stability improvements
 * Support for some new Cocoa classes, like NSURL
 * Improved compatibility with gstep-base
 * more and fixed timezone files
 * support for read-only strings in UTF-8 and UTF-16
 * some fixes for warnings thrown in new gcc (gcc3+) compilers