Add Integer::checked_{log,log2,log10}#70835

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yoshuawuyts wants to merge 2 commits intorust-lang:masterfrom yoshuawuyts:int-log2

+284

Commits on Jul 5, 2020

Add Integer::{log,log2, log10}
yoshuawuyts
committed

Commits on Jul 6, 2020

Touch up checked_log PR
dtolnay
committed