Add functional support for Docker sub commands on Solaris

Signed-off-by: Amit Krishnan <krish.amit@gmail.com>

Signed-off-by: Alexander Morozov <lk4d4@docker.com>

libcontainerd/utils_solaris.go

@@ -0,0 +1,27 @@
+package libcontainerd
+
+import (
+	"syscall"
+
+	containerd "github.com/docker/containerd/api/grpc/types"
+	"github.com/opencontainers/runtime-spec/specs-go"
+)
+
+func getRootIDs(s specs.Spec) (int, int, error) {
+	return 0, 0, nil
+}
+
+func systemPid(ctr *containerd.Container) uint32 {
+	var pid uint32
+	for _, p := range ctr.Processes {
+		if p.Pid == InitFriendlyName {
+			pid = p.SystemPid
+		}
+	}
+	return pid
+}
+
+// setPDeathSig sets the parent death signal to SIGKILL
+func setSysProcAttr(sid bool) *syscall.SysProcAttr {
+	return nil
+}