On systems that use System V semaphores, it is necessary to destroy
semaphores to free up system resources when the process finishes
execution.
PR-URL: https://github.com/libuv/libuv/pull/1559
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>