Fix: BigInt tests fail on 32-bit platforms
test: fix check-fast breakage.
librustc: Allow the type parameter version of `Self` to be spelled with a capital S
librustc: Implement `&static` as the replacement for `Durable`. r=nmatsakis
Merge pull request #4414 from gifnksm/bigint-test

Issue 4393 BigInt tests fail on 32-bit platforms