[PATCH] [libcxx] Get categories.numeric and facet.numpunct localization tests passing on linux

[Marshall Clow]

This all looks OK to me, but I wonder - is there a *right* answer for these routines. If so, what is the answer we should be expecting?

================
Comment at: test/localization/locale.categories/category.numeric/locale.nm.put/facet.num.put.members/put_long_double.pass.cpp:10722
@@ -10721,1 +10721,3 @@
     const my_facet f(1);
+
+#if !defined(__GLIBC__)
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Are these values mandated by a standard somewhere - or are they just "implementation defined"?

http://reviews.llvm.org/D4997