Fix gnulib issues found with glibc 2.28 libio.h removal

see
https://lists.gnu.org/r/bug-gnulib/2018-03/msg00000.html

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

Index: bison-3.0.4/lib/fseterr.c
===================================================================
--- bison-3.0.4.orig/lib/fseterr.c
+++ bison-3.0.4/lib/fseterr.c
@@ -29,7 +29,7 @@ fseterr (FILE *fp)
   /* Most systems provide FILE as a struct and the necessary bitmask in
      <stdio.h>, because they need it for implementing getc() and putc() as
      fast macros.  */
-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
   fp->_flags |= _IO_ERR_SEEN;
 #elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */
   fp_->_flags |= __SERR;
