dump pathops tests as hex json

Dump as hex instead of SVG to more accurately
capture pathops tests.

Use SkBits2Float to reconstruct SkScalar data.

Exclude tests with conics since, for the moment,
pathkit maps conics to quads.

R=kjlubick@google.com

Bug: skia:
Change-Id: Iba2836bde8f737f42c8da31cc26e83ce55de924a
Reviewed-on: https://skia-review.googlesource.com/146165
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Auto-Submit: Cary Clark <caryclark@skia.org>
4 files changed