Properly restore packages for the Roslyn SDK

Restore.cmd

@@ -41,6 +41,9 @@ call %NugetExe% restore "%RoslynRoot%build\ToolsetPackages\dev14.project.json" %
 echo Restoring packages: Toolsets (Dev15 VS SDK build tools)
 call %NugetExe% restore "%RoslynRoot%build\ToolsetPackages\dev15.project.json" %NuGetAdditionalCommandLineArgs% || goto :RestoreFailed
 
+echo Restoring packages: Roslyn SDK
+call %NugetExe% restore "%RoslynRoot%build\ToolsetPackages\roslynsdk.project.json" %NuGetAdditionalCommandLineArgs% || goto :RestoreFailed
+
 echo Restoring packages: Samples
 call %NugetExe% restore "%RoslynRoot%src\Samples\Samples.sln" %NuGetAdditionalCommandLineArgs% || goto :RestoreFailed
 

build/ToolsetPackages/roslynsdk.project.json

+{
+  "supports": {},
+  "dependencies": {
+    "NuGet.CommandLine": "2.8.5",
+    "Microsoft.Composition": "1.0.27",
+    "Microsoft.CodeAnalysis.Analyzers": "1.1.0",
+    "Microsoft.CodeAnalysis.Common": "1.0.0",
+    "Microsoft.CodeAnalysis.CSharp": "1.0.0",
+    "Microsoft.CodeAnalysis.CSharp.Workspaces": "1.0.0",
+    "Microsoft.CodeAnalysis.VisualBasic": "1.0.0",
+    "Microsoft.CodeAnalysis.VisualBasic.Workspaces": "1.0.0",
+    "Microsoft.CodeAnalysis.Workspaces.Common": "1.0.0",
+    "System.Reflection.Metadata": "1.0.21",
+    "System.Collections.Immutable": "1.1.36",
+  },
+  "frameworks": {
+    ".NETFramework,Version=v4.6": {}
+  },
+  "runtimes": {
+    "win": { },
+    "win7": { }
+  }
+}