SkFontHost_FreeType: better debugging info

Change-Id: I53d4ef096437346c3cb1c74e9b9bad329b2cabee
Reviewed-on: https://skia-review.googlesource.com/100180
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
3 files changed