[PATCH] [libcxx] Get categories.time localization tests passing on linux

[Ed Maste]

================
Comment at: test/localization/locale.categories/category.time/locale.time.get.byname/get_one.pass.cpp:47
@@ -45,1 +46,3 @@
+    // this test non-portable
+#ifdef __APPLE__
     {
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Perhaps `!defined(__GLIBC__)` instead.  FreeBSD has no timezone with `%c` either.

http://reviews.llvm.org/D4999