meson: Fix gst-launch build on UWP
The APIs we need from WinMM for higher timer resolution are only available for non-UWP apps. The winmm library itself is still available, so we need to disable the check.
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The APIs we need from WinMM for higher timer resolution are only available for non-UWP apps. The winmm library itself is still available, so we need to disable the check.