exp/locale/collate: added regression test for collate package based on UCA test files.
exp/locale/collate: added regression test for collate package
based on UCA test files.

R=r
CC=golang-dev
http://codereview.appspot.com/6216056

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang