Implement `operator<()`, `std::hash<>` Bug: b/145351270 Change-Id: I9ebcfccd3a1da36dc9286f6ed6d50c73c8c3bac3 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/48698 Kokoro-Result: kokoro <noreply+kokoro@google.com> Tested-by: Ben Clayton <bclayton@google.com> Reviewed-by: Antonio Maiorano <amaiorano@google.com>
