build: use broader detection for 'help'

PR-URL: #53045
Reviewed-By: Stefan Stojanovic <stefan.stojanovic@janeasystems.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

vcbuild.bat

@@ -4,14 +4,9 @@
 :: explicitly allow them to persist in the calling shell.
 endlocal
 
-if /i "%1"=="help" goto help
-if /i "%1"=="--help" goto help
-if /i "%1"=="-help" goto help
-if /i "%1"=="/help" goto help
-if /i "%1"=="?" goto help
-if /i "%1"=="-?" goto help
-if /i "%1"=="--?" goto help
-if /i "%1"=="/?" goto help
+set "arg=%1"
+if /i "%arg:~-1%"=="?" goto help
+if /i "%arg:~-4%"=="help" goto help
 
 cd %~dp0