Add solaris build support

Signed-off-by: Edward Pilatowicz <edward.pilatowicz@oracle.com>

server/server_solaris.go

@@ -0,0 +1,14 @@
+package server
+
+import "context"
+
+const (
+	// DefaultAddress is the default unix socket address
+	DefaultAddress = "/var/run/containerd/containerd.sock"
+	// DefaultDebuggAddress is the default unix socket address for pprof data
+	DefaultDebugAddress = "/var/run/containerd/debug.sock"
+)
+
+func apply(_ context.Context, _ *Config) error {
+	return nil
+}