Bug#293296: detect outdated libtool

[Peter Eisentraut <peter_e@gmx.net>]

Package: lintian
Version: 1.23.7
Severity: wishlist

It would be nice if lintian could detect if a package uses an outdated
libtool, the kind that always makes the day of the arm buildd maintainers.
I think this could be detected with fair accuracy from the source package.
Unfortunately, many packages still use outdated libtools, and sometimes
they even slip back in after the bug was fixed.  This check could save
many useless upload cycles.  Something to think about.