.fp files now support user-defined functions

Bug: skia:
Change-Id: I9903f4c7751474a066b52b1feab39b58a9cb7af2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/238439
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
2 files changed