Add verbose option to the node server. #770

Job	Run time
Test Browser on macOS (safari, default)	2m 4s
Test Browser on macOS (safari, disabled)	2m 33s
Test Browser on Linux (firefox, main)	49s
Test Browser on Linux (firefox, default)	1m 39s
Test Browser on macOS (safari, main)	1m 10s
Test Build	27s
Test Browser on Linux (firefox, disabled)	1m 27s
Test Browser on Linux (chrome, default)	1m 8s
Test Shell (v8, main)	41s
Test Shell (jsc, default)	3m 13s
Test Shell (jsc, main)	50s
Test Shell (v8, disabled)	1m 37s
Test Shell (spidermonkey, main)	53s
Test Shell (v8, default)	2m 51s
Test Shell (spidermonkey, disabled)	2m 13s
Test Shell (jsc, disabled)	1m 45s
Test Shell (spidermonkey, default)	5m 50s
Test Browser on Linux (chrome, disabled)	1m 6s
Test Browser on Linux (chrome, main)	39s
	32m 55s

Provide feedback