fix(core): (#6414) Fix build for FreeBSD #80

Job	Run time
Debug Build & Unit Tests (gcc)	2m 53s
Debug Build & Unit Tests (gcc, 32bit)	3m 0s
Debug Build & Unit Tests without Subscriptions (gcc)	2m 5s
Debug Build & Unit Tests with Diagnostics (gcc)	2m 54s
Debug Build & Unit Tests with multithreading (gcc)	2m 36s
Debug Build & Unit Tests with Alarms&Conditions (gcc)	10m 35s
Debug Build & Unit Tests (clang)	3m 56s
Debug Build & Unit Tests (tcc)	2m 17s
Encryption (MbedTLS) Build & Unit Tests (gcc)	2m 45s
PubSub Encryption (MbedTLS) Build & Unit Tests (gcc)	2m 54s
PubSub SKS Build & Unit Tests (gcc)	7m 45s
Encryption (OpenSSL) Build & Unit Tests (gcc)	2m 50s
Encryption (LibreSSL) Build & Unit Tests (gcc)	5m 16s
TPM Tool Build	2m 11s
Release Build	1m 24s
Amalgamation Build	1m 4s
Amalgamation Build with Multithreading	55s
Valgrind Build & Unit Tests with MbedTLS (gcc)	12m 26s
Valgrind Build & Unit Tests with OpenSSL (gcc)	12m 12s
Valgrind Examples with MbedTLS (gcc)	57m 57s
Valgrind Examples with OpenSSL (gcc)	58m 14s
Clang Static Analyzer	3m 30s
Build All Companion Specifications	9m 7s
	3h 30m 46s

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