build,windows: restore DISTTYPEDIR

* rename :exit to :distexit

Backport-PR-URL: #14842
PR-URL: #13969
Refs: #13900 (review)
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: João Reis <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: Rod Vagg <[email protected]>

Author: refack

vcbuild.bat

@@ -405,7 +405,7 @@ if not defined NODE_VERSION (
 if not defined DISTTYPE set DISTTYPE=release
 if "%DISTTYPE%"=="release" (
   set FULLVERSION=%NODE_VERSION%
-  exit /b 0
+  goto distexit
 )
 if "%DISTTYPE%"=="custom" (
   if not defined CUSTOMTAG (
@@ -432,4 +432,7 @@ if not "%DISTTYPE%"=="custom" (
   set TAG=%DISTTYPE%%DATESTRING%%COMMIT%
 )
 set FULLVERSION=%NODE_VERSION%-%TAG%
-exit /b 0
+
+:distexit
+if not defined DISTTYPEDIR set DISTTYPEDIR=%DISTTYPE%
+goto :EOF