Add another multilocale test to lock in chdir's behavior.

This was suggested in response to my file interface proposal.  It verifies that
a chdir() call before the first use of other locales will not affect the current
working directory of the other locales.
Merge pull request #664 from lydia-duncan/additionalChdirTest

Add another multilocale test to lock in chdir's behavior.

This was suggested in response to my file interface proposal. It verifies that
a chdir() call before the first use of other locales will not affect the current
working directory of the other locales.