Add additional implementation files needed by Skia.

This adds the files that are need by Skia's
SkFontHost::GetAdvancedTypefaceMetrics.

bug: 5445861
Change-Id: Id0cc770476fcdf852557e8e4c4451f92e4a291d6
Merge commit 'refs/changes/54/12654/2' of http://review.cyanogenmod.com/CyanogenMod/android_external_freetype into ics