Fix the Visual Studio solution not building after a fresh clone.

When someone clones the repository and wants to compile the
master branch (up to the latest commit fed9535519a1a918ed6734001b7f5c3a83dd8a10),
the solution will not compile because of a missing SharedAssemblyInfo.cs

This file was deleted in commit e5dfc7643a22e997cb993132eef65c4a19d1bc35.

I simply retrieved the file from a commit just before that and added it
again.

Now everyone can clone the repository and compile the solution without
running into compilation errors.