Add SoB tag to hack patches on generic target

[Ansuel Smith]

Hi,
we are trying to improve the situation about the hack patch
for the generic target.

Currently it's a mess... no header, extra old patch not needed,
patch with no sob tag.

Some user [1] are trying to improve the situation and checked
all the changes done to a specific patch and added the related
SoB tag.

I have some concern about adding arbitrary SoB tag without
clear permission of the developer.

So I'm asking here for some feedback/ideas on how to solve this
and eventually for permission for adding the SoB tag.

Can we assume that the one that made the change also take
responsibility for the patch? (following this rule, we should be
able to add the SoB and merge the proposed changes)

For reference there is also this issue to track hack patch [2]
and this pr that also tried to fix other hack patch about the topic. [3]

[1] https://github.com/openwrt/openwrt/pull/10769
[2] https://github.com/openwrt/openwrt/issues/10272
[3] https://github.com/openwrt/openwrt/pull/10264