lxc: update to 4.0.12

Also add update file.

srcpkgs/lxc/template

@@ -1,21 +1,21 @@
 # Template file for 'lxc'
 pkgname=lxc
-version=4.0.6
-revision=2
+version=4.0.12
+revision=1
 build_style=gnu-configure
 configure_args="--enable-doc --enable-seccomp
  --enable-capabilities --enable-apparmor --with-distro=none
  --with-rootfs-path=/var/lxc/containers --with-log-path=/var/lxc/log"
 hostmakedepends="automake libtool pkg-config docbook2x"
 makedepends="libcap-devel libseccomp-devel gnutls-devel libapparmor-devel"
-depends="xz wget gnupg"
+depends="xz wget"
 _desc="Linux Containers"
 short_desc="${_desc} - utilities"
 maintainer="Cameron Nemo <cnemo@tutanota.com>"
 license="LGPL-2.1-or-later"
 homepage="https://linuxcontainers.org"
 distfiles="https://linuxcontainers.org/downloads/lxc/lxc-${version}.tar.gz"
-checksum=9165dabc0bb6ef7f2fda2009aee90b20fbefe77ed8008347e9f06048eba1e463
+checksum=db242f8366fc63e8c7588bb2017b354173cf3c4b20abc18780debdc48b14d3ef
 
 conf_files="/etc/lxc/default.conf"
 make_dirs="

srcpkgs/lxc/update

@@ -0,0 +1 @@
+site="https://linuxcontainers.org/lxc/downloads/"