configre: properly check for libtoolize

Fix a copy-n-paste typo, where the libtoolize check
would re-run the libtool check.

Signed-off-by: Johannes Stezenbach <js@sig21.net>

 reporter_name="Nye Liu"

 reporter_url="http://sourceware.org/ml/crossgcc/2008-10/msg00046.html"

 reporter_comment=""