update to clang 10

Kind of a big rewrite to adapt to the new repository structure.

Change-Id: I7b437aaa6bdf684c4486fe91fe94984107b7f6f9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/279072
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
3 files changed