add strace test cases and test result

test/strace/strace/test2.c

@@ -0,0 +1,33 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <errno.h>
+
+int
+main(int argc, char **argv)
+{
+	pid_t pid;
+	int rc;
+	int st;
+
+	if (argv[1] && !strcmp(argv[1], "exec")) {
+		exit(1);
+	}
+
+	pid = fork();
+	if (pid == 0) {
+		sleep(1);
+		execl("test2", "test2", "exec", NULL);
+		exit(99);
+	}
+	sleep(2);
+	rc = wait(&st);
+	if (rc != pid) {
+		printf("test2 NG\n");
+		exit(1);
+	}
+	exit(0);
+}