resourceloader: Pass jQuery twice to 'implements' module wrapper

This must be done in two parts. A follow-up change will update the wrapper
signature in ResourceLoader::makeLoaderImplementScript to bind the
arguments to '$' and 'jQuery'.

Because almost all event-handling and DOM interaction is mediated by
jQuery, ResourceLoader could provide a per-module breakdown of the work
performed on each page view by passing each module a copy of the jQuery
object that wraps certain functions (like jQuery.fn.on) in module-aware
profiling code. I expect that profiling would only be enabled on a small
fraction of requests. The effect on ordinary page-views would be a
possible small speed-up as a result of jQuery look-ups resolving in
module (rather than global) scope, but I expect the difference to be
neglible and it is not a part of my motivation.

Because ResourceLoader must bind both '$' and 'jQuery' to module scope,
we pass jQuery twice. A separate commit will update the wrapper function's
signature in ResourceLoader::makeLoaderImplementScript. This has to happen
separately to ensure that no module binds jQuery to undefined due to
being loaded by an out-of-sync version of mediawiki.js.

Change-Id: I0c9edac359ceb16fc273de1e51ea70322f18353e
Merge "resourceloader: Pass jQuery twice to 'implements' module wrapper"