[Feature][ZXW-33]merge ZXW 0428 version

Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/string/argz-next.c b/ap/libc/glibc/glibc-2.23/string/argz-next.c
new file mode 100644
index 0000000..72ef39c
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/string/argz-next.c
@@ -0,0 +1,39 @@
+/* Iterate through the elements of an argz block.
+   Copyright (C) 1995-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Miles Bader <miles@gnu.org>
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <argz.h>
+#include <string.h>
+
+char *
+__argz_next (const char *argz, size_t argz_len, const char *entry)
+{
+  if (entry)
+    {
+      if (entry < argz + argz_len)
+	entry = strchr (entry, '\0') + 1;
+
+      return entry >= argz + argz_len ? NULL : (char *) entry;
+    }
+  else
+    if (argz_len > 0)
+      return (char *) argz;
+    else
+      return NULL;
+}
+weak_alias (__argz_next, argz_next)