add simplify to json tests

pathops_unittest -J dump.json
now generates both Op() and Simplify() tests and results.

Also, make json names unique. While this may not be necessary,
duplicate names may make debugging failing tests more difficult.

R=kjlubick@google.com

Bug: skia:
Change-Id: I2eed5a8141764a0ad993fb9a09c23b7d90d65048
Reviewed-on: https://skia-review.googlesource.com/146100
Commit-Queue: Cary Clark <caryclark@skia.org>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Auto-Submit: Cary Clark <caryclark@skia.org>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
14 files changed