w32: change the way text is measured when using DirectWrite

w32: change the way text is measured when using DirectWrite

Now the glyph outline is inspected directly to get its real size,
as the direct measuring functions give generic values for some
fonts.
* src/w32dwrite.c (data structures): Added data structures from
header files that are not present in the 32bit MinGW build
environment.
(text_extents_internal): Call GetGlyphRunOutline to get exact
glyph vertical bounds.  Add new parameter to make this optional
if case that information is not required.
(w32_dwrite_text_extents, w32_initialize_direct_write)
(w32_dwrite_draw): New parameter for 'text_extents_internal'.
(Bug#77171)

(cherry picked from commit 05480592898a2a33e7e683280456ada0d663bfd4)