Add Intl test that uses the basic example code

Add test that uses the basic example code
Committed: https://code.google.com/p/dart/source/detail?r=12349

[Alan Knight, 2012-09-13 19:53:38]

This should have been part of the previous CL, but I think when I renamed the
file it got lost from the CL.

[Alan Knight, 2012-09-13 19:54:04]

This should have been part of the previous CL, but I think when I renamed the
file it got dropped.

[Emily Fortuna, 2012-09-13 19:56:00]

lgtm