selftests: netfilter: nft_flowtable.sh: shellcheck cleanups

no functional changes intended except that test will now SKIP in
case kernel lacks bridge support and initial rule load failure provides
nft version information.

Signed-off-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/20240423130604.7013-6-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Florian Westphal 2024-04-23 15:05:48 +02:00 • committed by Jakub Kicinski
commit a18f284574