Updated mediawiki/extensions
Project: mediawiki/extensions/Collection  a17ec800d03c14026c34449f42bca477a21016a9

Merge i18n files, step 1

The stated reason for splitting, performance, is not valid at least since 1.16
so let's keep things simple.

Step 2: full export from Translatewiki will move the rest of messages into the same file.
Step 3: Delete the emptied file.

Change-Id: I7cdba22611f2948d09600fd08e52f1778f22c52d