[3/3] dwrite/tests: Some tests for drawing sequence for a layout

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=8225

Your paranoid android.


=== w8 (32 bit layout) ===
layout.c:191: Test failed: unexpected QI {d3e0e934-22a0-427e-aae4-7d9574b59db1}