apr: Check for libtoolize rather than libtool

apr: Check for libtoolize rather than libtool

Backport a patch from debian to make it check libtoolize rather than libtool.

https://sources.debian.org/data/main/a/apr/1.6.5-1/debian/patches/libtoolize_check.patch

This can also fix:
$ bitbake nativesdk-apr
buildconf: libtool not found.
           You need libtool version 1.4 or newer installed

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>