resolve failed testcases:ActsIpcSignalTest/IpcSignalTest

Change-Id: Id67b513ff5685d8ad0edace95de766edfbc16056

kernel_lite/ipc_posix/signal/SignalTest.h

@@ -21,6 +21,7 @@
 
 const int MAX_SIGNAL = 31;
 const int MAX_DESCRP_LEN = 32;
+const int KEEP_RUN_TIME = 150;
 enum SignalAction {TERMINATE, COREDUMP, IGNORE, STOP, CONTINUE};
 struct SignalNameAction {
     char signame[12];

kernel_lite/ipc_posix/signal/SignalTestUtils.cpp

@@ -115,7 +115,7 @@ void IpcSignalTest::DefaultActionTest(const int signum, const bool expectStop, c
         }
     } else { // child
         LOGD("child start");
-        KeepRun(150);
+        KeepRun(KEEP_RUN_TIME);
         if (expectStop) {
             LOG("Child should has been Terminated, but still alive.");
             exit(1);