[openssl/openssl] 8ca2a0: timing_load_creds: Add timersub macro for platform...

[Tomáš Mráz]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: 8ca2a012c8e4acd44e613463c903d3c7c6b86727
      https://github.com/openssl/openssl/commit/8ca2a012c8e4acd44e613463c903d3c7c6b86727
  Author: Tomas Mraz <tomas at openssl.org>
  Date:   2022-12-06 (Tue, 06 Dec 2022)

  Changed paths:
    M test/timing_load_creds.c

  Log Message:
  -----------
  timing_load_creds: Add timersub macro for platforms where it is missing

Fixes #19812

Reviewed-by: Matt Caswell <matt at openssl.org>
Reviewed-by: Hugo Landau <hlandau at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19817)

(cherry picked from commit f2e4629608c3a2f5d93a91ef95abc25726eec44c)