app-portage/gentoolkit: Sync with tree.
sys-fs/lvm2: Sync with tree.
net-dns/avahi: Remove: version 0.6.1 in the tree uses systemd USE flag.
Update the README.
sys-boot/plymouth: sync with tree

Signed-off-by: 袁野 <yuanyelele@gmail.com>
sys-devel/gcc-config: Sync with upstream

Signed-off-by: 袁野 <yuanyelele@gmail.com>
app-admin/perl-cleaner: Sync with upstream

Signed-off-by: 袁野 <yuanyelele@gmail.com>
app-admin/python-updater: Sync with upstream

Signed-off-by: 袁野 <yuanyelele@gmail.com>