Add autoloader before enabling apps

Else apps that require already autoloading in the installer
(files_antivius) die hard!

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

lib/private/legacy/app.php

@@ -364,6 +364,8 @@ class OC_App {
 			// check for required dependencies
 			$info = self::getAppInfo($appId);
 			self::checkAppDependencies($config, $l, $info);
+			$appPath = self::getAppPath($appId);
+			self::registerAutoloading($appId, $appPath);
 			$installer->installApp($appId);
 		}