Add podman static build

We’re now able to build a static podman binary based on a custom nix
derivation. This is integrated in cirrus as well, whereas a later target
would be to provide a self-contained static binary bundle which can be
installed on any Linux x64-bit system.

Fixes: https://github.com/containers/libpod/issues/1399

Signed-off-by: Sascha Grunert <sgrunert@suse.com>

libpod/define/info.go

@@ -33,6 +33,7 @@ type HostInfo struct {
 	SwapFree       int64                  `json:"swapFree"`
 	SwapTotal      int64                  `json:"swapTotal"`
 	Uptime         string                 `json:"uptime"`
+	Linkmode       string                 `json:"linkmode"`
 }
 
 // SlirpInfo describes the slirp exectuable that