libunwind changes needed to run code in sgx environment via rust-sgx.#57

Merged

cuviper merged 1 commit intorust-lang:rustc/10.0-2020-05-05from

AdrianCX:rustc/9.0-2019-12-19-rust-sgx-libunwind

Jun 2, 2020

Commits on May 26, 2020

Changes needed for 'x86_64-fortanix-unknown-sgx' nightly target.
AdrianCX
committed