(mfont__ft_drive_otf): Renamed back from mfont__ft_drive_gsub. (mfont__ft_drive_gpos): Delete extern.
(mfont__ft_drive_otf): Renamed back from
mfont__ft_drive_gsub.
(mfont__ft_drive_gpos): Delete extern.

xmirror/m17n-lib,xmirror/m17n-lib,xmirror/m17n-lib,xmirror/m17n-lib