ExTextOut has a bug on Windows 7 and above where it incorrectly
positions certain diacritics, using DirectWrite and Direct2D fixes
this. Implemented on-demand loading of the DLL so the old ExTextOut
based renderer will be used when drwite and d2d1 cannot be found
allowing this work on Windows XP (where this bug doesn't seem to occur)

Change-Id: I767d62c8188511e745373b61ba51e7e2745f7b8b
Reviewed-on: https://gerrit.libreoffice.org/23020Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Reviewed-by: Martin Hosken <martin_hosken@sil.org>