Fix undefined behaviour by allowing NaNs
One graphicsfuzz test contains computations with the float constant 0x1.8p+128.
This constant represents a NaN value. The computation with undef in the test
allows any optimization/triggers undefined behavior and the driver is free
to crash. Adding OpExecutionMode %4 SignedZeroInfNanPreserve 32 to the CTS fixes
this by allowing NaNs.
Affects:
dEQP-VK.graphicsfuzz.cov-instruction-simplify-atanh-log-undefined
Components: Vulkan
VK-GL-CTS issue: 3787
Change-Id: Id7140deddec240fdc5d9b1712c974199fa06b250