run dean4 test everywhere

This test got different results when run with a
GCC compiler generating FMA instructions. The
support for those have been dropped, so the
test should no longer fail.

TBR=reed@google.com
BUG=skia:5508

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2935

Change-Id: I318ec8ae12c9eb489f6f89bd59b202453943d31e
Reviewed-on: https://skia-review.googlesource.com/2935
Reviewed-by: Cary Clark <caryclark@google.com>
1 file changed