Add .sln for Microsoft.Fx.Portability.
Add .sln for Microsoft.Fx.Portability.

JJVertical/dotnet-apiport,twsouthwick/dotnet-apiport,JJVertical/dotnet-apiport,mjrousos/dotnet-apiport-old,Microsoft/dotnet-apiport,conniey/dotnet-apiport,mjrousos/dotnet-apiport,conniey/dotnet-apiport,Microsoft/dotnet-apiport,conniey/dotnet-apiport,mjrousos/dotnet-apiport,twsouthwick/dotnet-apiport,Microsoft/dotnet-apiport