fix: 修复hook层LOS_HOOK_TYPE_SEM_PEND的runningTask入参可能为空

在校验完semPend之后，就获取好runningTask并且与semPend关联

close: #I4BU4P
Signed-off-by: arvinzzz <zhaotianyu9@huawei.com>
Change-Id: Ib56a1a1db8e4471d9e2adb0b7c3d8b17b1f87b8d

kernel/src/los_sem.c

@@ -232,6 +232,8 @@ LITE_OS_SEC_TEXT UINT32 LOS_SemPend(UINT32 semHandle, UINT32 timeout)
         goto ERROR_SEM_PEND;
     }
 
+    runningTask = (LosTaskCB *)g_losTask.runTask;
+
     if (semPended->semCount > 0) {
         semPended->semCount--;
         LOS_IntRestore(intSave);
@@ -244,7 +246,6 @@ LITE_OS_SEC_TEXT UINT32 LOS_SemPend(UINT32 semHandle, UINT32 timeout)
         goto ERROR_SEM_PEND;
     }
 
-    runningTask = (LosTaskCB *)g_losTask.runTask;
     runningTask->taskSem = (VOID *)semPended;
     OsSchedTaskWait(&semPended->semList, timeout);
     LOS_IntRestore(intSave);