tests: shell: connect chains to hook point

tests: shell: connect chains to hook point

These tests should fail because they contain a loop or exceed the jump stack.

But this depends on the kernel validating chains that are not bound to any
basechain/hook point.

Wire up the initial chain to filter type.

Without this tests will start to fail when kernel stops validating
chains that are not reachable by any base chain.

Signed-off-by: Florian Westphal <fw@strlen.de>