Updated mediawiki/extensions
Project: mediawiki/extensions/WindowsAzureStorage  35a6862c55b218d5e832ef93d90474858bb8a6e4

Update the extension to work with MediaWiki 1.21

- Also updated to work with new Azure SDK

Change-Id: I919fb8e29777e766b478a69167bd6e0c0b1f361f