patch: fix CVE-2015-1196

A directory traversal flaw was reported in patch:

References:
http://www.openwall.com/lists/oss-security/2015/01/18/6
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=775227
https://bugzilla.redhat.com/show_bug.cgi?id=1182154



[YOCTO #7182]

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>