Add FreeBSD id's to these files, in advance of a separate update.

MFC after:	3 days

gnu/usr.bin/patch/backupfile.c

@@ -16,7 +16,11 @@
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>.
-   Some algorithms adapted from GNU Emacs. */
+   Some algorithms adapted from GNU Emacs.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
 
 #include "config.h"
 #include <stdio.h>

gnu/usr.bin/patch/backupfile.h

@@ -15,6 +15,10 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
+/*
+ * $FreeBSD$
+ */
+
 /* When to make backup files. */
 enum backup_type
 {

gnu/usr.bin/patch/getopt.c

@@ -18,8 +18,11 @@
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
-   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
-
+   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
 /* NOTE!!!  AIX requires this to be the first thing in the file.
    Do not put ANYTHING before it!  */
 #if !defined (__GNUC__) && defined (_AIX)

gnu/usr.bin/patch/getopt.h

@@ -15,6 +15,10 @@
    along with this program; if not, write to the Free Software
    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
+/*
+ * $FreeBSD$
+ */
+
 #ifndef _GETOPT_H
 #define _GETOPT_H 1