fix minor issue with build scripts

build.cmd

@@ -1,4 +1,6 @@
+@echo off
+
 REM Copyright (c) .NET Foundation and contributors. All rights reserved.
 REM Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
-@powershell -NoProfile -NoLogo -File %~dp0scripts\build.ps1 %*
+powershell -NoProfile -NoLogo -File %~dp0scripts\build.ps1 %*

scripts/build.ps1

@@ -9,7 +9,7 @@ param(
 $ErrorActionPreference="Stop"
 
 # Use a repo-local install directory (but not the artifacts directory because that gets cleaned a lot
-$env:DOTNET_INSTALL_DIR="$PSScriptRoot\.dotnet_stage0\win7-x64"
+$env:DOTNET_INSTALL_DIR="$(Convert-Path "$PSScriptRoot\..")\.dotnet_stage0\win7-x64"
 if (!(Test-Path $env:DOTNET_INSTALL_DIR))
 {
     mkdir $env:DOTNET_INSTALL_DIR | Out-Null

scripts/ci_build.cmd

@@ -1,8 +1,8 @@
+@echo off
+
 REM Copyright (c) .NET Foundation and contributors. All rights reserved.
 REM Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
-@echo off
-
 CALL %~dp0..\build.cmd %*
 
 exit /b %errorlevel%

scripts/dotnet-restore.cmd

@@ -1,7 +1,8 @@
+@Echo OFF
+
 REM Copyright (c) .NET Foundation and contributors. All rights reserved.
 REM Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
-@Echo OFF
 SETLOCAL
 SET ERRORLEVEL=