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More ubuntu tests #725

Job	Run time
Test Browser on macOS (safari, default)	1m 27s
Test Browser on macOS (safari, disabled)	1m 9s
Test Browser on macOS (safari, main)	54s
Test Browser on Linux (chrome, disabled)	25s
Test Build	38s
Test Browser on Linux (firefox, disabled)	31s
Test Browser on Linux (chrome, default)	24s
Test Browser on Linux (chrome, main)	28s
Test Browser on Linux (firefox, default)	27s
Test Shell (jsc, default)	3m 23s
Test Shell (spidermonkey, default)	5m 28s
Test Shell (spidermonkey, main)	56s
Test Shell (jsc, main)	52s
Test Browser on Linux (firefox, main)	26s
Test Shell (v8, default)	3m 1s
Test Shell (v8, disabled)	1m 47s
Test Shell (jsc, disabled)	2m 0s
Test Shell (v8, main)	42s
Test Shell (spidermonkey, disabled)	2m 17s
	27m 15s