Preliminary work for incremental ThinLTO.#52266

Merged

bors merged 7 commits intorust-lang:masterfrom

michaelwoerister:incr-thinlto-preliminaries

Jul 14, 2018

Commits on Jul 12, 2018

Adapt codegen-unit tests to new CGU naming scheme.
michaelwoerister
committed
Fix some run-make tests after object file naming has changed.
michaelwoerister
committed

Commits on Jul 13, 2018

Use callback-based interface to load ThinLTO import data into rustc.
michaelwoerister
committed