meson: add logic to select apple and windows dri

This is still not fully correct (haiku and BSD is notably probably not
correct), but Linux is not regressed and this should be correct for
macOS and Windows.

v2: - set the dri_platform to windows on Cygwin as well (Jon)
v3: - Add a better todo for Hurd (Eric)

Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
1 file changed