bin/175930: clang does not define __STDC_ISO_10646__, despite having Unicode in wchar_t

[linimon at FreeBSD.org]

Old Synopsis: CLang does not define __STDC_ISO_10646__, despite having Unicode in wchar_t
New Synopsis: clang does not define __STDC_ISO_10646__, despite having Unicode in wchar_t

Responsible-Changed-From-To: freebsd-bugs->freebsd-toolchain
Responsible-Changed-By: linimon
Responsible-Changed-When: Sat Feb 9 16:02:36 UTC 2013
Responsible-Changed-Why: 
let's see if anyone on toolchain@ has an opinion.

http://www.freebsd.org/cgi/query-pr.cgi?pr=175930