Continue analyzing functions after unknown jumps

[cadmic]

Currently dtk fails to analyze most of cinePlayer.cpp ActorInstance::checkEventKeys, because it stores a jump table on the stack and dtk can't track this. Instead of giving up, we now add to possible_missed_branches after unknown jumps too.

[encounter]

Thank you! I think I'd like to further restrict this logic just to avoid potentially being too greedy after returns. Does only applying this for BranchTarget::JumpTable { address: RelocationTarget::External, .. } work?

[encounter]

I adjusted it to not add to possible_missed_branches on BranchTarget::Return, but kept it for BranchTarget::Unknown | BranchTarget::JumpTable { address: RelocationTarget::External, .. }.