The commits of backport to stable branch is wrong owner

If Tom commit a patch to master, then Jack cherry-pick the patch to stable branch, when the patch is merged into stable branch, the commit statistics belong to Tom, but actually Jack do whole works of cherry-pick, handle the code conflict and discuss with reviewers.

I think Tom had been added 1 commit of master patch, and Jack should be the owner of stable patch, if we adjust the statistics rule, that will encourage more person to backport bug-fix into stable branch, to enhance the quality of stable branch.