Commit a51b7a1c (tdf#103831, tdf#100986:
Force using GDI when needed, 2017-03-03) noted that the DirectWrite text
renderer doesn't support vertical text, add initial support for this now
by extending the DirectWrite transform matrix to do rotation as well.

This is initial support, as it can be improved in two ways:

- vertical text is not cached

- only vertical Latin text is handled, which wants rotated glyphs (vs
  e.g. Japanese text that would not rotate the glyphs)

With this, the "unreadable" text in the bugdoc's chart is on par with
the the GDI rendering.

Change-Id: I07af4de6cb437f83cc40546396ec8c8aac456bb3
Reviewed-on: https://gerrit.libreoffice.org/71592Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins