Fix compilation warnings (#2235)

Sources/Plugins/NetworkVmnet/NetworkVmnetHelper+Start.swift

@@ -26,6 +26,7 @@ import ContainerizationError
 import ContainerizationExtras
 import Foundation
 import Logging
+import SystemPackage
 
 enum Variant: String, ExpressibleByArgument {
     case reserved

Sources/Plugins/RuntimeLinux/RuntimeLinuxHelper+Start.swift

@@ -24,6 +24,7 @@ import ContainerXPC
 import Foundation
 import Logging
 import NIO
+import SystemPackage
 
 extension RuntimeLinuxHelper {
     struct Start: AsyncParsableCommand {