Migrate more tests from blink repository.

test/webkit/fast/js/date-big-setmonth-expected.txt

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-This tests that a call to array.sort(compareFunction) does not crash from within a sort comparison function.
+This test checks for a regression against Date.setMonth fails with big values due to overflow.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
+PASS d.valueOf() is new Date(1980, 8, 1).valueOf()
 PASS successfullyParsed is true
 
 TEST COMPLETE