Adds code to load the SVG table data into an `svg'
structure and set the flag `FT_FACE_FLAG_SVG'.
* include/freetype/freetype.h: Adds `FT_FACE_FLAG_SVG'.
* include/freetype/internal/sfnt.h: Adds the fields
`load_svg' and `free_svg' to `SFNT_Interface'.
* include/freetype/internal/tttypes.h: Adds a void
pointer field `svg' to hold info from `SVG' table.
* include/freetype/internal/tttags.h: Adds the tag
`TTAG_SVG'.
* src/sfnt/ttsvg.c: Writes the functions
`tt_face_load_svg' and `tt_face_free_svg'
* src/sfnt/ttsvg.h: Writes header declarations for
`tt_face_load_svg' and `tt_face_free_svg'.
* src/sfnt/sfdriver.c: Adds the functions
`tt_face_load_svg' and `tt_face_free_svg' to
`sfnt_interface'.
* src/sfnt/sfnt.c: Includes `ttsvg.c'.
* src/sfnt/sfobjs.c: (sfnt_load_face) Adds code to
load `svg' table struct. (sfnt_done_face) Adds code
to free `svg' table struct.
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