We require libtool-2 (because old 1.5.x is crap). Unfortunately,
libtool-2 is still not available in many Linux distributions  -- now I
see it in unstable distributions only. The painless way how to resolve
this problem is to __temporary__ commit generated libtool-2 stuff to
our repository.

Signed-off-by: Karel Zak <kzak@redhat.com>