Further handle the lib64 -> lib symlinks.
It at least helps powerpc64 to build, and should innocuous to other archs.

/trunk/scripts/crosstool-NG.sh.in | 8 6 2 0 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

 # Compute IA-64-specific values

 CT_DoArchTupleValues() {

     # The architecture part of the tuple:

     CT_TARGET_ARCH="${CT_ARCH}"

 }