resolve: Scale back hard-coded extern prelude additions on 2015 edition#54671

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bors merged 3 commits intorust-lang:masterfrom

petrochenkov:extpre2015

Oct 17, 2018

Commits on Oct 13, 2018

Revert "rustc_resolve: move extern_prelude from Resolver to Session."
petrochenkov
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Copy extern prelude from resolver to global context
petrochenkov
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resolve: Scale back hard-coded extern prelude additions
petrochenkov
committed