kbuild: do not print extra logs for V=2

Some scripts increase the verbose level when V=1, but others when
not V=0.

I think the former is correct because V=2 is not a log level but
a switch to print the reason for rebuilding.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>

cert host tools: Stop complaining about deprecated OpenSSL functions

OpenSSL 3.0 deprecated the OpenSSL's ENGINE API. That is as may be, but
the kernel build host tools still use it. Disable the warning about
deprecated declarations until somebody who cares fixes it.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

certs: move scripts/extract-cert to certs/

extract-cert is only used in certs/Makefile.

Move it there and build extract-cert on demand.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>