* [libvpx] Fix arm-uwp builds for v142 toolset
This adds better support for targeting UWP as well as ARM/ARM64 for
regular Windows Desktop with the v142 toolset. Without this change,
arm-uwp fails to build with v142. For v141 and earlier, the old
behavior remains unchanged.
* [libvpx] Fix Linux and macOS builds
* [libvpx] updated version record
* [libvpx] updated version record
