Fix creating the .../lib/ directory structure in the non-sysroot case

The symbol link that is created in the sysroot directory only needs
to be made when the cross compiler is build with the sysroot option

Signed-off-by: Bart van der Meulen <bartvdrmeulen@gmail.com>
(transplanted from 0e49e6eddac4f5bbde6394eb3e6e36be75fc550c)

 reporter_name="Ioannis E. VENETIS"

 reporter_url="http://sourceware.org/ml/crossgcc/2008-06/msg00017.html"

 reporter_comment=""