A simple MD file to show the source set hierarchy which constrains where
includes can go in Tint.
Change-Id: Ia360430793faef01503260f29f88ef361bb91611
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/120443
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>