libupnp-1.6.18 is compatible with automake 1.11/1.12/1.13.
should be all set now in the tree; thanks for the report! Commit message: Drop automake-1.9 requirement http://sources.gentoo.org/net-libs/libupnp/libupnp-1.6.18.ebuild?r1=1.9&r2=1.10