SECURITY_LDFLAGS contains stack protector flag inappropriately, which
has already be contained in SECURITY_CFLAGS. Let's remove it from
SECURITY_LDFLAGS.
(From OE-Core rev: 549cce578b859986e37900bf15c1bf904d33e47b)
Signed-off-by: Junling Zheng <zhengjunling@huawei.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>