Add placeholder build tasks

build/azure-pipelines/darwin/build.sh

 #!/usr/bin/env bash
 set -e
 yarn gulp vscode-darwin-min
+yarn gulp vscode-reh-darwin-min
 yarn gulp upload-vscode-sourcemaps
\ No newline at end of file

build/azure-pipelines/linux/build.sh

 #!/usr/bin/env bash
 set -e
-yarn gulp "vscode-linux-$VSCODE_ARCH-min"
\ No newline at end of file
+yarn gulp "vscode-linux-$VSCODE_ARCH-min"
+
+if [[ "$VSCODE_ARCH" != "ia32" ]]; then
+	yarn gulp vscode-reh-linux-$VSCODE_ARCH-min
+fi
\ No newline at end of file

build/azure-pipelines/win32/build.ps1

 . build/azure-pipelines/win32/exec.ps1
 $ErrorActionPreference = "Stop"
 exec { yarn gulp "vscode-win32-$env:VSCODE_ARCH-min" }
+exec { yarn gulp "vscode-reh-win32-$env:VSCODE_ARCH-min" }
 exec { yarn gulp "vscode-win32-$env:VSCODE_ARCH-inno-updater" }
\ No newline at end of file

build/gulpfile.reh.js

+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+const gulp = require('gulp');
+
+const noop = () => { return Promise.resolve(); };
+
+gulp.task('vscode-reh-win32-ia32-min', noop);
+gulp.task('vscode-reh-win32-x64-min', noop);
+gulp.task('vscode-reh-darwin-min', noop);
+gulp.task('vscode-reh-linux-x64-min', noop);
+gulp.task('vscode-reh-linux-arm-min', noop);