Add mirrors.kernel.org as mirror, listed on sourceware mirror sites
page.
Link: https://sourceware.org/mirrors.html
Signed-off-by: Ryan Keane <the.ra2.ifv@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/16886
Signed-off-by: Robert Marko <robimarko@gmail.com>
(cherry picked from commit 63caa2b168)
Link: https://github.com/openwrt/openwrt/pull/17097
Signed-off-by: Petr Štetiar <ynezz@true.cz>