Reverse the order of inputs to Circle.

This shouldn't make any difference; a*b and b*a are the same. However,
this order gives us SkSL that looks closer to the original code. This
might give us better results on older Pixel 2/3 devices on Vulkan.
These devices started noise/garbage pixels after
http://review.skia.org/580595.

Change-Id: I05811bf0fe670d8821ef20f70f8dd6e65beea64b
Bug: skia:13737
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/580966
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
1 file changed