Add satellite assemblies for the Roslyn assemblies that we ship in
Microsoft.NETCore.Compiler.nupkg. This includes
Microsoft.CodeAnalysis.dll, Microsoft.CodeAnalysis.CSharp.dll,
Microsoft.CodeAnalysis.VisualBasic.dll, and
Microsoft.Build.Tasks.CodeAnalysis.dll.

This increases the resulting .nupkg size from about 8,988KB to about
12,000KB.