basic experiments for understanding lowp
basic experiments for understanding lowp

Change-Id: I5f0c36b44cd5bfd3f978d892a342a1d008baceb2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/446176
Reviewed-by: Herb Derby <9e12a3d2bbf73546e47cc9958f6ba8f3215b7eaf@google.com>
Reviewed-by: Brian Osman <794c0b5534edf5601d88e1d41975d0262da12894@google.com>
Commit-Queue: Herb Derby <9e12a3d2bbf73546e47cc9958f6ba8f3215b7eaf@google.com>

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