grub2: fix another case of gnulib failing under gnu libc

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34389 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/boot/grub2/patches/200-fix-gets-removal.patch

+--- a/grub-core/gnulib/stdio.in.h
++++ b/grub-core/gnulib/stdio.in.h
+@@ -137,12 +137,6 @@
+                  "use gnulib module fflush for portable POSIX compliance");
+ #endif
+ 
+-/* It is very rare that the developer ever has full control of stdin,
+-   so any use of gets warrants an unconditional warning.  Assume it is
+-   always declared, since it is required by C89.  */
+-#undef gets
+-_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
+-
+ #if @GNULIB_FOPEN@
+ # if @REPLACE_FOPEN@
+ #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)