Add libexif to deps/third_party.

libexif/sources/libexif/i18n.h

+/* i18n.h
+ *
+ * Copyright (c) 2001 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.
+ */
+
+#ifndef __I18N_H__
+#define __I18N_H__
+
+#include "config.h"
+
+#ifdef ENABLE_NLS
+#  include <libintl.h>
+#  undef _
+#  define _(String) dgettext (GETTEXT_PACKAGE, String)
+#  ifdef gettext_noop
+#    define N_(String) gettext_noop (String)
+#  else
+#    define N_(String) (String)
+#  endif
+#else
+#  define textdomain(String) (String)
+#  define gettext(String) (String)
+#  define ngettext(String1,String2,Count) (Count==1?String1:String2)
+#  define dgettext(Domain,Message) (Message)
+#  define dcgettext(Domain,Message,Type) (Message)
+#ifdef __WATCOMC__
+#    define bind_textdomain_codeset(Domain,Codeset)
+#    define bindtextdomain(Domain,Directory)
+#else
+#    define bind_textdomain_codeset(Domain,Codeset) (Codeset)
+#    define bindtextdomain(Domain,Directory) (Domain)
+#endif
+#  define _(String) (String)
+#  define N_(String) (String)
+#endif
+
+#endif /* __I18N_H__ */