resolve bookmaker refs fixes

Getting ready to update include/core generated bookmaker
files. Fixing errors when resolving references in
bmh files.

Docs-Preview: https://skia.org/?cl=106281
Bug: skia:6898
Change-Id: Ic1cbe5b7b9b9f09346e460802b8f21d2ec14329d
Reviewed-on: https://skia-review.googlesource.com/106281
Commit-Queue: Cary Clark <caryclark@google.com>
Reviewed-by: Cary Clark <caryclark@skia.org>
13 files changed