fix bookmaker

Move some documentation from SkPaint_Reference.bmh to
SkFont_Reference.bmh. Since the legacy routines are still
in SkPaint.h (and not yet marked as deprecated) duplicate
much of it for now.

This get bookmaker running without error, but the generated
documentation is not organized.

TBR=reed@google.com,bungeman@google.com

Docs-Preview: https://skia.org/?cl=175241
Bug: skia:
Change-Id: I31e7dff425e8c0bbac0179a1f3546fbc38fc4504
Reviewed-on: https://skia-review.googlesource.com/c/175241
Commit-Queue: Cary Clark <caryclark@skia.org>
Reviewed-by: Cary Clark <caryclark@skia.org>
14 files changed