Reverted to something more like the original code.
Reverted to something more like the original code.

Now that we're using `OriginalDefinition` we don't need to check for IsUnboundGenericType, and we can go back to just calling builder.Add once.

pakdev/roslyn-analyzers,mavasani/roslyn-analyzers,dotnet/roslyn-analyzers,mavasani/roslyn-analyzers,pakdev/roslyn-analyzers,dotnet/roslyn-analyzers