Try out clang-tidy, starting with bugprone-use-after-move

 - add drop-in clang-tidy cxx wrapper
 - get build clean for bugprone-use-after-move

The wrapper can be used by setting

   cxx = "/path/to/skia/tools/clang-tidy.sh"

in GN.

Change-Id: Idbba911e23bd6ef7530b08fd31906b92c1c1b28c
Reviewed-on: https://skia-review.googlesource.com/c/176523
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
16 files changed