test: use normalize() for unicode paths
test: use normalize() for unicode paths

OS X 10.11 changed the unicode normalization form of certain code points
returned by system calls like getcwd() from NFC to NFD which made
results in this test failing.

The consensus of https://github.com/nodejs/node/issues/2165 is to delegate
the task of unicode normalization to the user, and work will continue to
document how to handle unicode in a form-sensitive file system.

PR-URL: https://github.com/nodejs/node/pull/3007
Fixes: https://github.com/nodejs/node/issues/2165
Reviewed-By: Johan Bergström <3e38e5ce4283f06de4b83ad13af081abc5e16740@bergstroem.nu>
Reviewed-By: Jeremiah Senkpiel <f1782d15e31ad502ea2c097c21cc235811d0cb7c@rocketmail.com>
Reviewed-By: Sakthipriyan Vairamani <b84950071fc99921a72f4fa56f6cad2496b3223c@gmail.com>

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