Approximate conics as quads in GrAAHairlinePathRenderer when fp32 not supported

This fixes the precision issues with hairline conics on Mali 4xx.

Change-Id: I1924915eba7bf6056df1fb8dd366ecebd8c40dd0
Reviewed-on: https://skia-review.googlesource.com/126622
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
1 file changed