pig-icl-1065g7: piglit:spec tests - fail/warn

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8424/pig-icl-1065g7/spec@glsl-1.10@execution@fs-dfdy-accuracy.html

Out	
Probe color at (1,0)
  Expected: 0 255 0 255
  Observed: 255 0 0 255
Test failure on line 38
Environment	
PIGLIT_SOURCE_DIR="/opt/igt/piglit" PIGLIT_PLATFORM="gbm"
Command	
/opt/igt/piglit/bin/shader_runner /opt/igt/piglit/tests/spec/glsl-1.10/execution/fs-dfdy-accuracy.shader_test -auto -fbo