zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/test/unistd/vfork.c b/ap/build/uClibc/test/unistd/vfork.c
new file mode 100644
index 0000000..2955839
--- /dev/null
+++ b/ap/build/uClibc/test/unistd/vfork.c
@@ -0,0 +1,53 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * vfork test for uClibc
+ * Copyright (C) 2000-2006 by Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+
+
+int main(void)
+{
+	pid_t pid;
+	int status, wpid;
+	char *argv[] = {
+		"/bin/ls",
+		"-laF",
+		NULL,
+	};
+
+	clearenv();
+	if ((pid = vfork()) == 0) {
+		printf("Hi.  I'm the child process...\n");
+		execvp(argv[0], argv);
+		_exit(0);
+	}
+
+	printf("Hello.  I'm the parent process.\n");
+	while (1) {
+		wpid = wait(&status);
+		if (wpid > 0 && wpid != pid) {
+			continue;
+		}
+		if (wpid == pid)
+			break;
+	}
+
+	printf("Child process exited.\nGoodbye.\n");
+	return EXIT_SUCCESS;
+}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/