Updated Building Testing and Debugging (markdown)

Building-Testing-and-Debugging.md

@@ -14,7 +14,7 @@ Please see the [known contributor issues](https://github.com/dotnet/roslyn/label
 
 1. Open Developer Command Prompt for VS2015
 2. Clone https://github.com/dotnet/roslyn
-3. Run: `nuget.exe restore Roslyn.sln`
+3. Run: `Restore.cmd`
 4. Due to [Issue #5876](https://github.com/dotnet/roslyn/issues/5876), you should build on the command line before opening in Visual Studio.  Run: `msbuild /v:m /m Roslyn.sln`
 5. Open _Roslyn.sln_