[phobos] win32 phobos build broken

[Shin Fujishiro]

It depends on the order of compilation.  The following succeeds:

% dmd -c std/concurrency.d std/string.d
% _

While the following fails (note the order of arguments):

% dmd -c std/string.d std/concurrency.d
std/typecons.d(336): Error: cannot evaluate empty("") at compile time
std/typecons.d(371): Error: cannot evaluate injectNamedFields() at compile time
std/typecons.d(371): Error: argument to mixin must be a string, not (injectNamedFields())

Anyways, I'll check in a workaround.


Shin