sys-devel/automake-1.10 installs /usr/share/doc/automake/amhello-1.0.tar.gz (as well as /usr/share/doc/automake-1.10) Adding: econf --docdir=/usr/share/doc/${PF} || die "econf failed" puts amhello-1.0.tar.gz in /usr/share/doc/automake-1.10
fixed in cvs, thanks for the report and fix