SkQP: relax test radial_gradient_precision

motivation: this is a bad test in that low-precision drivers will give
completely different results.

The jitter test might have caught this, but  I ran the jitter test with
the 8888 backend, which has high precision.

Bug: skia:8857
Change-Id: I7111ca34df7e510a1dbb591b1161b32912c82fe0
Reviewed-by: Michael Ludwig <>
1 file changed