Bug#757585: missing libtool-update on smpeg

[Andreas Barth]

* Andreas Barth (aba at ayous.org) [140829 23:55]:
> - Remove everything from acinclude.m4 except the entry for socklen_t
>   (the last one).

According to changelog that change was already done by Branden
Robinson in 2001, and confirmed by Felix Geyer in 2011.

For that reason I tend to commit that change again on Sunday evening
unless I get review otherwise.



Andi