hurd-i386 defines NO_HIDDEN, thus __GI_* versions are not available.

This was introduced by

https://sourceware.org/bugzilla/show_bug.cgi?id=15605

Since Debian glibc is built with -O2, we shouldn't actually have the issue, but
we should try not to define NO_HIDDEN

---
 symbol-hacks.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
Index: eglibc-2.18/sysdeps/generic/symbol-hacks.h
===================================================================
--- eglibc-2.18.orig/sysdeps/generic/symbol-hacks.h	2013-06-15 17:37:04.000000000 +0000
+++ eglibc-2.18/sysdeps/generic/symbol-hacks.h	2013-10-10 06:28:31.000000000 +0000
@@ -1,6 +1,9 @@
 /* Some compiler optimizations may transform loops into memset/memmove
    calls and without proper declaration it may generate PLT calls.  */
 #if !defined __ASSEMBLER__ && !defined NOT_IN_libc && defined SHARED
+#include <config.h>
+#  if !defined NO_HIDDEN
 asm ("memmove = __GI_memmove");
 asm ("memset = __GI_memset");
+#  endif
 #endif