Add an empty console application that will hold the LSIF generator

Roslyn.sln

@@ -422,6 +422,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "CompilersIOperationGenerator", "src\Tools\Source\CompilerGeneratorTools\Source\IOperationGenerator\CompilersIOperationGenerator.csproj", "{D55FB2BD-CC9E-454B-9654-94AF5D910BF7}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.CodeAnalysis.Lsif.Generator", "src\Features\Lsif\Generator\Microsoft.CodeAnalysis.Lsif.Generator.csproj", "{B9899CF1-E0EB-4599-9E24-6939A04B4979}"
+EndProject
 Global
 	GlobalSection(SharedMSBuildProjectFiles) = preSolution
 		src\Compilers\Core\AnalyzerDriver\AnalyzerDriver.projitems*{1ee8cad3-55f9-4d91-96b2-084641da9a6c}*SharedItemsImports = 5
@@ -1123,6 +1125,10 @@ Global
 		{D55FB2BD-CC9E-454B-9654-94AF5D910BF7}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{D55FB2BD-CC9E-454B-9654-94AF5D910BF7}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{D55FB2BD-CC9E-454B-9654-94AF5D910BF7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B9899CF1-E0EB-4599-9E24-6939A04B4979}.Debug|Any CPU.ActiveCfg = Debug|x64
+		{B9899CF1-E0EB-4599-9E24-6939A04B4979}.Debug|Any CPU.Build.0 = Debug|x64
+		{B9899CF1-E0EB-4599-9E24-6939A04B4979}.Release|Any CPU.ActiveCfg = Release|x64
+		{B9899CF1-E0EB-4599-9E24-6939A04B4979}.Release|Any CPU.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -1318,6 +1324,7 @@ Global
 		{CE7F7553-DB2D-4839-92E3-F042E4261B4E} = {8DBA5174-B0AA-4561-82B1-A46607697753}
 		{FF38E9C9-7A25-44F0-B2C4-24C9BFD6A8F6} = {FD0FAF5F-1DED-485C-99FA-84B97F3A8EEC}
 		{D55FB2BD-CC9E-454B-9654-94AF5D910BF7} = {FD0FAF5F-1DED-485C-99FA-84B97F3A8EEC}
+		{B9899CF1-E0EB-4599-9E24-6939A04B4979} = {3E5FE3DB-45F7-4D83-9097-8F05D3B3AEC6}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {604E6B91-7BC0-4126-AE07-D4D2FEFC3D29}

src/Features/Lsif/Generator/Microsoft.CodeAnalysis.Lsif.Generator.csproj

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information. -->
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <Platform Condition="'$(Platform)' == ''">x64</Platform>
+    <PlatformTarget>x64</PlatformTarget>
+    <Platforms>x64</Platforms>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>Microsoft.CodeAnalysis.Lsif.Generator</RootNamespace>
+    <AutoGenerateBindingRedirects>True</AutoGenerateBindingRedirects>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <RuntimeIdentifiers>$(RoslynPortableRuntimeIdentifiers)</RuntimeIdentifiers>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+</Project>
\ No newline at end of file

src/Features/Lsif/Generator/Program.cs

+// Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
+
+namespace Microsoft.CodeAnalysis.Lsif.Generator
+{
+    internal static class Program
+    {
+        public static void Main(string[] args)
+        {
+        }
+    }
+}

src/Features/Lsif/Generator/README.md

+This tool consumes a project or solution and generates a Language Server Index Format file per the [LSIF specification](https://github.com/Microsoft/language-server-protocol/blob/master/indexFormat/specification.md).
\ No newline at end of file