Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  a73c880b40e9a17ad9f5ef9fd1f6332a12db2743
null
Fix WikibaseLib.php in case not loaded in the default environment

If WikibaseLib.php is invoked without the auto loader being avialable
the following error will occur (this eg. happens when using the
install maintenance script):
PHP Fatal error:  Class 'Wikibase\TemplateRegistry' not found in /srv/extensions/Wikibase/lib/WikibaseLib.php on line 242

(Untested)

Change-Id: I88bfd5e9ac766e8248af94586d9f5bf73d41b614