[1.1.X] Fixed #11284 - Stop forcing the use of the djangojs domain when the...

[1.1.X] Fixed #11284 - Stop forcing the use of the djangojs domain when the ".js" file extension is passed to makemessages management command. Thanks, Ramiro Morales.

Backport of r12439.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12450 bcc190cf-cafb-0310-a4f2-bffc1f526a37