test: 修复llvm升级导致tdd用例部分失败问题

方案描述：
1、llvm升级之后对while(1)死循环和给空指针赋值的场景有错误优化的情况；
   用例中在相关函数之前添加__attribute__((optnone))禁止编译器进行错误优化。

Close：#I6V2LN

Signed-off-by: zhangdengyu <zhangdengyu2@huawei.com>
Change-Id: Ic7150909c12a599aeeb0a55b983dfad7a0631cdc

testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_040.cpp

@@ -30,7 +30,7 @@
  */
 #include "It_posix_queue.h"
 
-static VOID *PthreadF01(VOID *argument)
+__attribute__((optnone)) static VOID *PthreadF01(VOID *argument)
 {
     INT32 i;
     INT32 ret;
@@ -54,7 +54,7 @@ EXIT:
     return NULL;
 }
 
-static VOID *PthreadF02(VOID *argument)
+__attribute__((optnone)) static VOID *PthreadF02(VOID *argument)
 {
     INT32 j, ret;
 
@@ -79,7 +79,7 @@ EXIT:
     return NULL;
 }
 
-static UINT32 Testcase(VOID)
+__attribute__((optnone)) static UINT32 Testcase(VOID)
 {
     pthread_t newTh1, newTh2;
     UINT32 ret;

testsuites/unittest/libc/posix/mqueue/full/It_posix_queue_113.cpp

@@ -53,7 +53,6 @@ EXIT:
 static UINT32 Testcase(VOID)
 {
     INT32 ret;
-    UINT32 uret;
     CHAR mqname[MQUEUE_STANDARD_NAME_LENGTH] = "";
     const CHAR *msgptr = MQUEUE_SEND_STRING_TEST;
     pthread_t pthread1;
@@ -92,7 +91,6 @@ static UINT32 Testcase(VOID)
     ICUNIT_GOTO_EQUAL(ret, MQUEUE_NO_ERROR, ret, EXIT2);
 
     usleep(0);
-    ICUNIT_GOTO_EQUAL(uret, MQUEUE_NO_ERROR, uret, EXIT2);
 
     ret = pthread_join(pthread1, NULL);
     ICUNIT_GOTO_EQUAL(ret, MQUEUE_NO_ERROR, ret, EXIT2);