Add 'benchmark' target to Makefile that runs all benchmarks
Add 'benchmark' target to Makefile that runs all benchmarks

replay/metrictank,raintank/metrictank,raintank/metrictank,replay/metrictank,replay/metrictank,raintank/metrictank,replay/metrictank,raintank/metrictank,raintank/raintank-metric,raintank/raintank-metric,raintank/raintank-metric