Update Android port

Update Android port

* src/sfnt.c (sfnt_make_interpreter): New argument `fvar'.  Set
axis count.
(SCANCTRL): Implement selector bit 8.
(GXAXIS): New instruction.
(SFVTPV): Validate graphics state after changing freedom vector.
(sfnt_line_to_vector): Implement `original'.
(sfnt_move): Remove redundant division.
(sfnt_interpret_run): Implement distortable font related GXAXIS
instruction (0x91).
(sfnt_vary_interpreter): Set naxis and norm_coords.
(sfnt_make_test_interpreter, pushb_test_args, pushw_test_args)
(sfnt_name_instruction, main): Adjust accordingly.
* src/sfnt.h (struct sfnt_interpreter, PROTOTYPE):
* src/sfntfont.c (sfntfont_setup_interpreter, sfntfont_open):
Set up distortion information.