!807 修复A核测试用例失败的问题

Merge pull request !807 from yinjiaming/sys_test

testsuites/unittest/libc/time/clock/full/clock_test_002.cpp

@@ -34,6 +34,7 @@ static void *ThreadFuncTest(void *arg)
 {
     printf("Subthread starting infinite loop\n");
     while (1) {
+        pthread_testcancel();
     }
 }
 
@@ -80,6 +81,9 @@ static int ClockTest(void)
     ret = ThreadClock("Subthread CPU time:   ", clockid);
     ICUNIT_ASSERT_EQUAL(ret, 0, ret);
 
+    ret = pthread_cancel(thread);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
     return 0;
 }