Mark BROKEN on FreeBSD 13 and 14

c++ -O2 -pipe -fstack-protector-strong -fno-strict-aliasing -I../../include -Iposix -I../core/posix -c -o activity_statistics_monitor.o activity_statistics_monitor.cpp
In file included from activity_statistics_monitor.cpp:18:
In file included from ./incoming_message.h:20:
In file included from ./parameters.h:20:
In file included from ./parameter_entry.h:24:
In file included from /usr/include/c++/v1/string:506:
In file included from /usr/include/c++/v1/string_view:175:
In file included from /usr/include/c++/v1/__string:57:
In file included from /usr/include/c++/v1/algorithm:643:
In file included from /usr/include/c++/v1/memory:681:
In file included from /usr/include/c++/v1/atomic:571:
/usr/include/c++/v1/__threading_support:76:9: error: unknown type name 'sem_t'
typedef sem_t __libcpp_semaphore_t;

^

Reported by: pkg-fallout
MFH: 2021Q1