Rename build/util/type-safety to build/util/type_safety

This is for consistency, most other code uses underscores to separate words
rather than dashes.

Bug: 954080
Change-Id: I3b0d1e0a33e5196344fbd7d52f187f87607bbcb2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1608742
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Commit-Queue: Maciej Pawlowski <mpawlowski@opera.com>
Cr-Commit-Position: refs/heads/master@{#660307}
18 files changed