deps: float 99540ec from openssl (CVE-2018-0735)

Low severity timing vulnerability in ECDSA signature generation

Publicly disclosed but unreleased, pending OpenSSL 1.1.0j

Also includes trivial syntax fix from
https://github.com/openssl/openssl/pull/7516

Ref: https://www.openssl.org/news/secadv/20181029.txt
Ref: https://github.com/openssl/openssl/pull/7486
PR-URL: https://github.com/nodejs/node/pull/???
Upstream: https://github.com/openssl/openssl/commit/99540ec



Original commit message:

    Timing vulnerability in ECDSA signature generation (CVE-2018-0735)

    Preallocate an extra limb for some of the big numbers to avoid a reallocation
    that can potentially provide a side channel.

Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
    (Merged from https://github.com/openssl/openssl/pull/7486)

PR-URL: https://github.com/nodejs/node/pull/23950
Refs: https://www.openssl.org/news/secadv/20181029.txt
Refs: https://github.com/openssl/openssl/pull/7486


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>