Synchronize with FreeType, part 2.
This commit is the second of a series that synchronizes ttfautohint with
FreeType, updating from commit
9193259c `[autofit] s/DFLT/NONE/,
s/dflt/none/.', to commit
0d97744d, `[autofit] Fix Indic scripts.'.
Here, we only do mechanical substitutions on the original FreeType files,
namely
s/Script_(.*)Func/WritingSystem_\1Func/
s/script/style/
s/SCRIPT/STYLE/
s/Script/Style/
where appropriate, together with minor and trivial adjustments like
whitespace issues.
This commit prevents compilation.