freetype: upgrade 2.13.2 -> 2.13.3

freetype: upgrade 2.13.2 -> 2.13.3

Changelog:
==========
- Some  fields  in  the  'FT_Outline' structure  have been   changed
  from signed  to unsigned type,  which  better reflects  the actual
  usage.
- Rare double-free crashes in the cache subsystem have been fixed.
- Excessive stack allocation in the autohinter has been fixed.
- The B/W  rasterizer has  received a major  upkeep that  results in
  large performance improvements.
- If the new configuration option 'TT_CONFIG_OPTION_GPOS_KERNING' is
  defined,  'FT_Get_Kerning'  understands rudimentary  GPOS  kerning
  (for TrueType fonts  only).
- The internal structures  'PS_DesignMap' and 'PS_Blend' related  to
  parsing of old Multiple Masters fonts  have been removed  from the
  public header file 't1tables.h'.

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>