Fix pathdata build

- need a bot to exercise the SK_PATH_USES_PATHDATA flag

Change-Id: I38a39066cbb6bc92cee441461eaefd8976cc9571
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1092239
Reviewed-by: Eric Boren <borenet@google.com>
Reviewed-by: Florin Malita <fmalita@google.com>
Commit-Queue: Mike Reed <mike@reedtribe.org>