[L/unstable 03/13] UBUNTU: [Packaging] add -rR MAKEFLAGS to clear implicit rules

[Masahiro Yamada]

On Wed, Dec 7, 2022 at 3:50 PM Juerg Haefliger
<juerg.haefliger at canonical.com> wrote:
>
> On Mon,  5 Dec 2022 17:56:09 +0900
> Masahiro Yamada <masahiro.yamada at canonical.com> wrote:
>
> > Cancel implicit rules, otherwise GNU Make will try to examine a lot of
> > internal rules to update makefiles.
>
> Are we certain we don't rely on any implicit rule?

For -r, --no-builtin-rules,
all architectures successfully built on cbd.


For -R, --no-builtin-variables,
I noticed one error, so inserted a fixup.

See  02/13.