Accepting request 487523 from home:cyphar:containers

- Update to umoci v0.2.1. Upstream changelog:
	* `hack/release.sh` automates the process of generating all of the published
	  artefacts for releases. The new script also generates signed source code
	  archives. openSUSE/umoci#116
	* `umoci` now outputs configurations that are compliant with [`v1.0.0-rc5` of
	  the OCI runtime-spec][rspec-v1.0.0-rc5]. This means that now you can use runc
	  v1.0.0-rc3 with `umoci` (and rootless containers should work out of the box
	  if you use a development build of runc). openSUSE/umoci#114
	* `umoci unpack` no longer adds a dummy linux.seccomp entry, and instead just
	  sets it to null. openSUSE/umoci#114

	[rspec-v1.0.0-rc5]: https://github.com/opencontainers/runtime-spec/releases/tag/v1.0.0-rc5
- Add umoci.keyring to check signed archives on check-in and submission.

OBS-URL: https://build.opensuse.org/request/show/487523
OBS-URL: https://build.opensuse.org/package/show/Virtualization:containers/umoci?expand=0&rev=19

umoci.spec

@@ -27,13 +27,15 @@
 %define project github.com/openSUSE/umoci
 
 Name:           umoci
-Version:        0.2.0
+Version:        0.2.1
 Release:        0
 Summary:        Open Container Image manipulation tool
 License:        Apache-2.0
 Group:          System/Management
 Url:            https://github.com/openSUSE/umoci
-Source:         %{name}-%{version}.tar.xz
+Source0:        %{name}-%{version}.tar.xz
+Source1:        %{name}-%{version}.tar.xz.asc
+Source2:        %{name}.keyring
 %ifarch %{go_arches}
 BuildRequires:  go >= 1.6
 BuildRequires:  go-go-md2man