[PATCH 2.27] RISC-V: fix struct kernel_sigaction to match the kernel version [BZ #23069]

[DJ Delorie]

Aurelien Jarno <aurelien@aurel32.net> writes:
> So it seems more risky to me.

I agree.

> Also note that this is not an installed header, but just a compile
> time header.

So no user-visible ABI change, good.  Ok with me then :-)