www/feroxbuster: fix build on powerpc
ld: error: undefined symbol: __atomic_is_lock_free >>> referenced by threads_pthread.c >>> libcrypto-lib-threads_pthread.o:(CRYPTO_atomic_or) in archive /wrkdirs/usr/ports/www/feroxbuster/work/rustcqv4eu9/libopenssl_sys-000d228428b7ac21.rlib >>> referenced by threads_pthread.c >>> libcrypto-lib-threads_pthread.o:(CRYPTO_atomic_load) in archive /wrkdirs/usr/ports/www/feroxbuster/work/rustcqv4eu9/libopenssl_sys-000d228428b7ac21.rlib cc: error: linker command failed with exit code 1 (use -v to see invocation)