- update docker to 1.12.3

- fix bsc#1007249 - CVE-2016-8867: Fix ambient capability usage in containers
 - other fixes:
   https://github.com/docker/docker/releases/tag/v1.12.3

OBS-URL: https://build.opensuse.org/package/show/Virtualization:containers/docker?expand=0&rev=150

docker.spec

@@ -36,7 +36,7 @@
 %global docker_migration_warnfile %{docker_store}/docker-update-message.txt
 %define docker_graph              %{docker_store}/graph
 %define git_version 8eab29e
-%define version_unconverted 1.12.2
+%define version_unconverted 1.12.3
 %define docker_version 1.12.1
 %define __arch_install_post export NO_BRP_STRIP_DEBUG=true
 # When upgrading to a new version requires the service not to be restarted
@@ -45,7 +45,7 @@
 # 1.10.1
 %global last_migration_version 1.10.1
 Name:           docker
-Version:        1.12.2
+Version:        1.12.3
 Release:        0
 Summary:        The Linux container runtime
 License:        Apache-2.0