Set __moduleName from context.id argument

[guybedford]

This resolves #6359 using the method suggested by @vladima as the replacement to the original PR at #6098.

This context object is described at https://github.com/ModuleLoader/es6-module-loader/wiki/System.register-Explained#how-it-works, and was considered more extensible for future spec changes than a string second argument directly.

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[msftclas]

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[mhegazy]

👍, looks like we have two unit tests that need to be updated.
@vladima, can you take a look.

[vladima]

I think this variable has to be injected after the prologue directive "use strict"

[mhegazy]

this should be var __moduleName = ${contextObjectForFile} && ${contextObjectForFile}.id; to avoid breaking users of older JSPM versions.

[guybedford]

Thanks, I've made these corrections.

[vladima]

@guybedford can you please fix two remaining failing tests so we can pull in this PR?

[guybedford]

@vladima sure I've got them passing now.

[mhegazy]

thanks!

[mhegazy]

@vladima can you merge this in release-1.8 as well.

[guybedford]

👍 Thanks for all the help getting this in.