Updated mediawiki/extensions
Project: mediawiki/extensions/WikiLexicalData  7503373f5c521de442c937eb541484cee2370aa4

Corrected a few things:
* replaced owDatabaseAPI with OwDatabaseAPI where needed
(strange that it worked before)
* SpecialSelect: OmegaWikiDatabaseAPI was not included
* SpecialSuggest: declaring private variables

Change-Id: I63f1c5390ad0b0b289d61c60b2b3c443819b32ee