[autofit] Add support for Mongolian script.

As a de-facto standard, layouts using this script are constructed
horizontally line by line, then the lines are rotated clockwise for
vertical display.

* src/autofit/afblue.dat: Add blue zone data for Mongolian.
* src/autofit/afblue.c, src/autofit/afblue.h: Regenerated.

* src/autofit/afscript.h: Add Mongolian standard characters.

* src/autofit/afranges.c, src/autofit/afstyles.h: Add Mongolian
data.
7 files changed