libupnp: add upstream security fix for CVE-2016-8863

libupnp: add upstream security fix for CVE-2016-8863

Fix out-of-bound access in create_url_list()

If there is an invalid URL in URLS->buf after a valid one, uri_parse is
called with out pointing after the allocated memory. As uri_parse writes
to *out before returning an error the loop in create_url_list must be
stopped early to prevent an out-of-bound access.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>