Add Pack attribute to OSMFEULA content item

For the dumb .NET SDK Pack targets if a project doesn't use the smarter NuGetizer.

Author: kzu

src/Directory.Build.props

@@ -167,7 +167,7 @@
  </ItemGroup>
 
  <ItemGroupLabel="OSMF"Condition="Exists('$(MSBuildThisFileDirectory)..\osmfeula.txt')">
- <ContentInclude="$(MSBuildThisFileDirectory)..\osmfeula.txt"Link="osmfeula.txt"PackagePath="OSMFEULA.txt" />
+ <ContentInclude="$(MSBuildThisFileDirectory)..\osmfeula.txt"Link="osmfeula.txt"Pack="true"PackagePath="OSMFEULA.txt" />
  </ItemGroup>
 
  <ImportProject="Directory.props"Condition="Exists('Directory.props')"/>