Package: Fix installation check script

Author: Goldfish64

BuildScripts/build-toolspkg.py

@@ -308,7 +308,7 @@ def buildBundlePkg(moduleName, moduleFriendlyName, payloadPath, postInstallScrip
     "rootVolumeOnly"         : "true"
     })
 ET.SubElement(distInstallerGuiScript, "script").text = mpkgScriptsJS
-# ET.SubElement(distInstallerGuiScript, "installation-check", { "script" : "installCheckScript()" })
+ET.SubElement(distInstallerGuiScript, "installation-check", { "script" : "installCheckScript()" })
 
 # Choices outline.
 distChoices = ET.SubElement(distInstallerGuiScript, "choices-outline")