scripts/feeds: shallow clone submodules
When a feed has submodules, all its submodules are fully cloned whereas
the feed itself is shallowed. Let's be consistent and perform shallow clones
as well for the submodules.
Signed-off-by: Cedric CHEDALEUX <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/18003
Signed-off-by: Robert Marko <[email protected]>
(cherry picked from commit
9ec32cfb2733856a2ab4caee07d9b3297568381d)
Link: https://github.com/openwrt/openwrt/pull/18168
Signed-off-by: Christian Marangi <[email protected]>