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="Remy Bohmer"

reporter_url="linux@bohmer.net"

reporter_comment="Example for building a toolchain for m68000 bare metal targets"