[phobos] std.datetime fails on FreeBSD

[Walter Bright]

Here's what I get trying to run the unittests on phobos:

Testing generated/freebsd/debug/32/unittest/std/algorithm
Testing generated/freebsd/debug/32/unittest/std/array
Testing generated/freebsd/debug/32/unittest/std/base64
Testing generated/freebsd/debug/32/unittest/std/bigint
Testing generated/freebsd/debug/32/unittest/std/bitmanip
Testing generated/freebsd/debug/32/unittest/std/compiler
Testing generated/freebsd/debug/32/unittest/std/complex
Testing generated/freebsd/debug/32/unittest/std/concurrency
Testing generated/freebsd/debug/32/unittest/std/container
Testing generated/freebsd/debug/32/unittest/std/contracts
std.contracts has been scheduled for deprecation. Please use std.exception inste
ad.
Testing generated/freebsd/debug/32/unittest/std/conv
Testing generated/freebsd/debug/32/unittest/std/cpuid
Testing generated/freebsd/debug/32/unittest/std/cstream
Testing generated/freebsd/debug/32/unittest/std/ctype
Testing generated/freebsd/debug/32/unittest/std/date
std.date and std.dateparse have been scheduled for deprecation. Please use std.d
atetime instead.
Testing generated/freebsd/debug/32/unittest/std/datetime
gmake[2]: *** [generated/freebsd/debug/32/unittest/std/datetime] Killed: 9
gmake[1]: *** [unittest] Error 2
gmake[1]: Leaving directory `/usr/home/walter/cbx/mars/phobos'
gmake: *** [unittest] Error 2