NaN handling in float16 tests

NaN handling in float16 tests

Support of NaNs is optional according the specification.
Tests always have expected that NaNs are always supported.
To be compatible with the specification skip check of NaN
input floats in logical.* and add a new set of tests
logical_nan.*.  The new tests require device extension
VK_KHR_shader_float_controls to validate whether NaNs are
supported (property shaderSignedZeroInfNanPreserveFloat16).

Updated tests:
 * dEQP-VK.spirv_assembly.instruction.compute.float16.logical.opfunord*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.logical.opfunord*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.logical.opford*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.logical.opford*

Added tests:
 * dEQP-VK.spirv_assembly.instruction.compute.float16.logical_nan.*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.logical_nan.*

Affected tests:
 * dEQP-VK.spirv_assembly.instruction.compute.float16.logical.opisnan*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.logical.opisnan*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.logical.opisinf*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.logical.opisinf*

Components: Vulkan

VK-GL-CTS issue: 1528

Change-Id: Iadd91ed24c78e15ff458355262b009015b8a8e4a