build: update signtool description, add url

PR-URL: https://github.com/nodejs/node/pull/4011
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: Alexis Campailla <orangemocha@nodejs.org>

vcbuild.bat

@@ -186,7 +186,7 @@ if "%target%" == "Clean" goto exit
 @rem Skip signing if the `nosign` option was specified.
 if defined nosign goto licensertf
 
-signtool sign /a /d "node" /t http://timestamp.globalsign.com/scripts/timestamp.dll Release\node.exe
+signtool sign /a /d "Node.js" /du "https://nodejs.org" /t http://timestamp.globalsign.com/scripts/timestamp.dll Release\node.exe
 if errorlevel 1 echo Failed to sign exe&goto exit
 
 :licensertf
@@ -206,7 +206,7 @@ msbuild "%~dp0tools\msvs\msi\nodemsi.sln" /m /t:Clean,Build /p:PlatformToolset=%
 if errorlevel 1 goto exit
 
 if defined nosign goto upload
-signtool sign /a /d "node" /t http://timestamp.globalsign.com/scripts/timestamp.dll node-v%FULLVERSION%-%target_arch%.msi
+signtool sign /a /d "Node.js" /du "https://nodejs.org" /t http://timestamp.globalsign.com/scripts/timestamp.dll node-v%FULLVERSION%-%target_arch%.msi
 if errorlevel 1 echo Failed to sign msi&goto exit
 
 :upload