deps: float 15d7e79 from openssl

The upstream commit fixes an incorrect initialization of memory in
rand_lib.c. This fixes all errors that are reported by valgrind during
startup.

Origin: https://github.com/openssl/openssl/commit/15d7e7997e219fc

PR-URL: https://github.com/nodejs/node/pull/28796
Fixes: https://github.com/nodejs/node/issues/28739


Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Shigeki Ohtsu <ohtsu@ohtsu.org>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>