change back to 'arrayUtil'

as per dojo documentation, correct argument alias is ‘arrayUtil’.

https://docs.google.com/spreadsheet/ccc?key=0Avm8Hjje-xiXdFBVSURNdFpHSmN
zOXlMcnU5V3k1Rmc#gid=0

mapbaker was mistaken by the references in a few of our locator samples
(urls below):

https://developers.arcgis.com/javascript/jssamples/locator_address.html
https://developers.arcgis.com/javascript/jssamples/locator_details.html