test: 修复了杀死掉hilog进程后SecurityCapability门禁用例无法通过的问题

【背景】如果操作系统先执行kill hilog进程，然后再执行SecurityCapability，那么门禁用例将无法通过，原因是该用例先获取了hilog进程的id，但hilog进程已经杀掉了，所以报错

【修改方案】
1. 增加kill 0与错误码判断，如果发现进程已经被干掉的话将不执行相关内容

【影响】
无其它影响。
Signed-off-by: Nvcbchang <vcbchang@qq.com>
Change-Id: Icdf357800175eff19acf1f92426469642a697386

testsuites/unittest/security/capability/smoke/cap_test_001.cpp

@@ -82,22 +82,38 @@ static int TestChild(VOID)
     capheader.pid = INVAILD_PID;
     ret = capget(&capheader, &capdatac[0]);
     ICUNIT_ASSERT_EQUAL(ret, -1, ret);
+    errno = 0;
     capheader.pid = 3;
-    ret = capget(&capheader, &capdatac[0]);
-    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
-    printf("e %d,p %d\n", capdatac[0].effective, capdatac[0].permitted);
+    kill(capheader.pid, 0);
+    if (errno != ESRCH) {
+        ret = capget(&capheader, &capdatac[0]);
+        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+        printf("e %d,p %d\n", capdatac[0].effective, capdatac[0].permitted);
+    }
+    errno = 0;
     capheader.pid = 4;
-    ret = capget(&capheader, &capdatac[0]);
-    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
-    printf("e %d,p %d\n", capdatac[0].effective, capdatac[0].permitted);
+    kill(capheader.pid, 0);
+    if (errno != ESRCH) {
+        ret = capget(&capheader, &capdatac[0]);
+        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+        printf("e %d,p %d\n", capdatac[0].effective, capdatac[0].permitted);
+    }
+    errno = 0;
     capheader.pid = 5;
-    ret = capget(&capheader, &capdatac[0]);
-    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
-    printf("e %d,p %d\n", capdatac[0].effective, capdatac[0].permitted);
+    kill(capheader.pid, 0);
+    if (errno != ESRCH) {
+        ret = capget(&capheader, &capdatac[0]);
+        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+        printf("e %d,p %d\n", capdatac[0].effective, capdatac[0].permitted);
+    }
+    errno = 0;
     capheader.pid = 6;
-    ret = capget(&capheader, &capdatac[0]);
-    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
-    printf("e %d,p %d\n", capdatac[0].effective, capdatac[0].permitted);
+    kill(capheader.pid, 0);
+    if (errno != ESRCH) {
+        ret = capget(&capheader, &capdatac[0]);
+        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+        printf("e %d,p %d\n", capdatac[0].effective, capdatac[0].permitted);
+    }
     capheader.pid = 0;
 
     int pid = fork();