Revert "xlib_libXft: fix xft-config"

This reverts commit 1a100993.

Fixes http://autobuild.buildroot.net/results/e8c00cf5ec1e3829cd9013710bb1961d9c226c34



xlib_libXft hasn't provided an xft-config script since 2010.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>