Introduce prototype-style definition for __libc_fatal.  Upstream, this

was done as part of:

commit a600e5cef53e10147932d910cdb2fdfc62afae4e

Author: Roland McGrath <roland@hack.frob.com>

Date:   Tue Mar 19 17:07:15 2013 -0700

    Consolidate Linux and POSIX libc_fatal code.

diff --git a/sysdeps/unix/sysv/linux/libc_fatal.c b/sysdeps/unix/sysv/linux/libc_fatal.c

index 6cc96d76e98fe191..90dd6265152824e5 100644

--- a/sysdeps/unix/sysv/linux/libc_fatal.c

+++ b/sysdeps/unix/sysv/linux/libc_fatal.c

@@ -199,8 +199,7 @@ __libc_message (int do_abort, const char *fmt, ...)

 void

-__libc_fatal (message)

-     const char *message;

+__libc_fatal (const char *message)

 {

   /* The loop is added only to keep gcc happy.  */

   while (1)