util: fix test on msvc
We also miss this function on MSVC. But let's use the functionality in meson to check for supported functions instead of hand-rolling the list here.
Fixes: 067023dc ("util: Add some unit tests of the half-float conversions.")
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We also miss this function on MSVC. But let's use the functionality in meson to check for supported functions instead of hand-rolling the list here.
Fixes: 067023dc ("util: Add some unit tests of the half-float conversions.")