[llvm] [AArch64] Lower jump table cases threshold to 10 (PR #143632)

[David Sherwood via llvm-commits]

https://github.com/david-arm approved this pull request.

LGTM! Seems reasonable. If we do see any other regressions due to the change it's always easy enough to revert.

https://github.com/llvm/llvm-project/pull/143632