Add msbuild-based stage0 where possible (#4597)

* Add msbuild-based stage0 where possible

* Fix bash initialization script

* Windows Fixes

* Fix dotnet deb tool

build_projects/dotnet-cli-build/DotNetBuildPJ.cs

@@ -0,0 +1,66 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.DotNet.Cli.Build
+{
+    public class DotNetBuildPJ : DotNetTool
+    {
+        protected override string Command
+        {
+            get { return "build"; }
+        }
+
+        protected override string Args
+        {
+            get { return $"{GetProjectPath()} {GetConfiguration()} {GetFramework()} {GetBuildBasePath()}"; }
+        }
+
+        public string BuildBasePath { get; set; }
+
+        public string Configuration { get; set; }
+
+        public string Framework { get; set; }
+
+        public string ProjectPath { get; set; }
+
+        private string GetBuildBasePath()
+        {
+            if (!string.IsNullOrEmpty(BuildBasePath))
+            {
+                return $"--build-base-path {BuildBasePath}";
+            }
+
+            return null;
+        }
+
+        private string GetConfiguration()
+        {
+            if (!string.IsNullOrEmpty(Configuration))
+            {
+                return $"--configuration {Configuration}";
+            }
+
+            return null;
+        }
+
+        private string GetFramework()
+        {
+            if (!string.IsNullOrEmpty(Framework))
+            {
+                return $"--framework {Framework}";
+            }
+
+            return null;
+        }
+
+        private string GetProjectPath()
+        {
+            if (!string.IsNullOrEmpty(ProjectPath))
+            {
+                return $"{ProjectPath}";
+            }
+
+            return null;
+        }
+    }
+}