please test if it's ok to keyword version 1.3.1-r4 1.3.6 for arm, ppc64 it's required by connman-1.28, see bug 542336 Reproducible: Always
At least for arm should work, Debian and ArchLinuxARM have this package. I'm not sure about ppc64 though. Let's see what the ppc64 team will say about it.
+ 07 Mar 2015; Yixun Lan <dlan@gentoo.org> xl2tpd-1.3.1-r4.ebuild, + xl2tpd-1.3.6.ebuild: + add arm support, tested on cortex-a9 board
done mips & ppc64 now