The generic google notice didn't satisfy the dart script.
Tracked down this LICENSE at the root of the D3D12 Library project:
https://github.com/microsoft/DirectX-Graphics-Samples/blob/master/LICENSE
This matches "the MIT" license mentioned in the d3dx12.h header, hopefully
that's enough for the license script to detect a match, w/o needing to
update the script itself.
Bug: skia:10105
Change-Id: I1d4bf52b888a13f6727503024cb8f3e933078542
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281594
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
e99c56fae7