Remove NaN from OpFOrd* and OpFUnord* tests

Remove NaN from OpFOrd* and OpFUnord* tests

Due to Vulkan specification enables NaNs to be unsupported
by implementation, the NaN values cannot be processed.

As it is quite complicated to remove NaNs from tested values
stream this fix just blocks their analysis.

Following instructions are not fully tested now:
 * OpFOrdEqual
 * OpFOrdGreaterThan
 * OpFOrdLessThan
 * OpFOrdGreaterThanEqual
 * OpFOrdLessThanEqual
 * OpFUnordEqual
 * OpFUnordGreaterThan
 * OpFUnordLessThan
 * OpFUnordGreaterThanEqual
 * OpFUnordLessThanEqual

Affected tests:
 * dEQP-VK.glsl.builtin.precision.comparison.mediump_compute.*
 * dEQP-VK.glsl.builtin.precision.comparison.highp_compute.*
 * dEQP-VK.glsl.builtin.precision_fp16_storage16b.comparison.compute.*
 * dEQP-VK.glsl.builtin.precision_fp16_storage32b.comparison.compute.*

Components: Vulkan

VK-GL-CTS issue: 1423

Change-Id: Ic64cfdbe23d796de90dae0931109421ded2b526a