Add libexif to deps/third_party.

libexif/sources/libexif/exif-byte-order.c

+/* exif-byte-order.c
+ *
+ * Copyright (c) 2002 Lutz Mueller <lutz@users.sourceforge.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, 
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details. 
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301  USA.
+ */
+
+#include <config.h>
+
+#include <libexif/exif-byte-order.h>
+#include <libexif/i18n.h>
+
+#include <stdlib.h>
+
+const char *
+exif_byte_order_get_name (ExifByteOrder order)
+{
+        switch (order) {
+        case EXIF_BYTE_ORDER_MOTOROLA:
+                return (_("Motorola"));
+        case EXIF_BYTE_ORDER_INTEL:
+                return (_("Intel"));
+        default:
+                return NULL;
+        }
+}