Move bindings tooling scripts to Tools/Scripts/webkitpy/bindings

These scripts are not a part of code generator so it would be
better to put them in Tools/Scripts/webkitpy/bindings.

BUG=617899

Review-Url: https://codereview.chromium.org/2169673003
Cr-Commit-Position: refs/heads/master@{#406957}
10 files changed