Copy any found sysextensions into active+passive efi dir (#372)

internal/agent/hooks/hook.go

@@ -33,6 +33,7 @@ var FirstBoot = []Interface{
 
 // AfterUkiInstall sets which Hooks to run after uki runs the install action
 var AfterUkiInstall = []Interface{
+	&SysExtPostInstall{},
 	&Lifecycle{},
 }