Suggest not using <NativeDlls> in .props file

[sdcb]

Because <NativeDlls> looks pretty generic, so many project might be using this name, if one project include 2 NuGet packages that include native library which using <NativeDlls> defined in their prop file, these 2 <NativeDlls> will conflicted(and it happens in my project):

https://github.com/shimat/opencvsharp/blob/51fee5e/nuget/OpenCvSharp4.runtime.win.props#L3

Maybe using a more specific word here will better, like <OpenCvSharp4ExternalNativeDlls>

[shimat]

Thank you 👍