fix: add module stub method-GetBootStageHookMgr

Signed-off-by: Nlaiguizhong <laiguizhong@huawei.com>
Change-Id: If5ca82bd9eaffc16f7a2ce261eb8cd1976e8e314

interfaces/innerkits/init_module_engine/stub/libinit.stub.json

@@ -6,6 +6,7 @@
     { "name": "AddCmdExecutor" },
     { "name": "RemoveCmdExecutor" },
     { "name": "HookMgrAdd" },
+    { "name": "GetBootStageHookMgr"},
     { "name": "InitAddGlobalInitHook" },
     { "name": "InitAddPreParamServiceHook" },
     { "name": "InitAddPreParamLoadHook" },