win32: Enable extensions explicitly

Merged: https://github.com/ruby/ruby/pull/14806

win32/configure.bat

@@ -1,5 +1,5 @@
 @echo off
-@setlocal disabledelayedexpansion
+@setlocal EnableExtensions DisableDelayedExpansion || exit /b -1
 set PROMPT=$E[94m+$E[m$S
 set witharg=
 

win32/ifchange.bat

@@ -1,6 +1,8 @@
 @echo off
 :: usage: ifchange target temporary
 
+@setlocal EnableExtensions DisableDelayedExpansion || exit /b -1
+
 :: @set PROMPT=$T:$S
 for %%I in (%0) do set progname=%%~nI
 set timestamp=

win32/install-buildtools.cmd

@@ -1,5 +1,5 @@
 @echo off
-setlocal
+@setlocal EnableExtensions DisableDelayedExpansion || exit /b -1
 
 set components=VC.Tools.x86.x64 VC.Redist.14.Latest CoreBuildTools
 set components=%components% Windows11SDK.26100

win32/lastrev.bat

@@ -1,5 +1,6 @@
-@setlocal
 @echo off
+@setlocal EnableExtensions DisableDelayedExpansion || exit /b -1
+
 if "%1" == "" (set gitdir=.) else (set gitdir=%1)
 set TZ=UTC
 for /f "usebackq tokens=1-3" %%I in (

win32/makedirs.bat

@@ -1,3 +1,3 @@
 @echo off
-setlocal EnableExtensions
+@setlocal EnableExtensions DisableDelayedExpansion || exit /b -1
 for %%I in (%*) do if not exist "%%~I/." mkdir "%%~I"

win32/rm.bat

@@ -1,5 +1,5 @@
 @echo off
-setlocal
+@setlocal EnableExtensions DisableDelayedExpansion || exit /b -1
 set recursive=
 :optloop
 if "%1" == "-f" shift

win32/rmdirs.bat

@@ -1,5 +1,5 @@
-::-*- batch -*-
 @echo off
+@setlocal EnableExtensions DisableDelayedExpansion || exit /b -1
 if "%1" == "-p" shift
 :begin
 if "%1" == "" goto :end

win32/rtname.cmd

@@ -1,4 +1,5 @@
 @echo off
+@setlocal EnableExtensions DisableDelayedExpansion || exit /b -1
 set rt=
 set rtver=
 set osver=

win32/vssetup.cmd

@@ -1,4 +1,4 @@
-@setlocal ENABLEEXTENSIONS
+@setlocal EnableExtensions DisableDelayedExpansion || exit /b -1
 ::- do not `echo off` that affects the called batch files
 
 ::- check for vswhere