Update reference to "swirl" effect
Update reference to "swirl" effect

SkCurve and SkColorCurve (which were used by the old version) are being
removed. The new hash refers to the replacement version that implements
the same effect in SkSL.

Bug: skia:9513
Change-Id: Id9200b4e5bcc90a5430be4bdf678479276164c31
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/247045
Auto-Submit: Brian Osman <794c0b5534edf5601d88e1d41975d0262da12894@google.com>
Commit-Queue: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot