#286: Add an error message if ITIMER_PROF is not supported
#286: Add an error message if ITIMER_PROF is not supported

apangin/async-profiler,jvm-profiling-tools/async-profiler,apangin/async-profiler,jvm-profiling-tools/async-profiler,jvm-profiling-tools/async-profiler,jvm-profiling-tools/async-profiler,apangin/async-profiler,apangin/async-profiler,jvm-profiling-tools/async-profiler