[C#] Add packaging artifacts to build a .nuget zip

[ldk-java] / c_sharp / packaging_artifacts / _rels / .rels

<?xml version="1.0" encoding="utf-8"?>
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Type="http://schemas.microsoft.com/packaging/2010/07/manifest" Target="/org.ldk.nuspec" Id="spec" />
  <Relationship Type="http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties" Target="/package/services/metadata/core-properties/ldk.psmdcp" Id="Properties" />
</Relationships>