win,msi: Added empty InstallExecuteSequence group

This is needed so that we can backport
668bde8ac0 from io.js with
a clean merge.

PR-URL: https://github.com/joyent/node/pull/25100
Reviewed-By: Julien Gilli <julien.gilli@joyent.com>
Fixes: https://github.com/joyent/node/issues/4356

tools/msvs/msi/product.wxs

@@ -237,6 +237,9 @@
       </Component>
     </DirectoryRef>
 
+    <InstallExecuteSequence>
+    </InstallExecuteSequence>
+
     <UI Id="NodeInstallUI">
       <TextStyle Id="WixUI_Font_Normal" FaceName="Tahoma" Size="8"/>
       <TextStyle Id="WixUI_Font_Bigger" FaceName="Tahoma" Size="12"/>