glib-networking: Add test retry to avoid failures

In autobuilder testing we regularly see glib-networking ptest fail with a
"Resource temporarily unavailable (g-io-error-quark, 27)" error.

Add a patch to see if a retry can resolve the issue.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 4deb03ee)
Signed-off-by: Steve Sakoman <steve@sakoman.com>