Move LISTFILE macro from libdpkg to dpkg

This is a private macro, internal to the file database handling code,
currently in dpkg only.

lib/dpkg/dpkg.h

@@ -65,7 +65,6 @@ DPKG_BEGIN_DECLS
 #define POSTINSTFILE       "postinst"
 #define PRERMFILE          "prerm"
 #define POSTRMFILE         "postrm"
-#define LISTFILE           "list"
 #define TRIGGERSCIFILE     "triggers"
 
 #define STATUSFILE        "status"

src/filesdb.h

@@ -144,6 +144,8 @@ gid_t statdb_parse_gid(const char *str);
 mode_t statdb_parse_mode(const char *str);
 void ensure_statoverrides(void);
 
+#define LISTFILE           "list"
+
 void ensure_packagefiles_available(struct pkginfo *pkg);
 void ensure_allinstfiles_available(void);
 void ensure_allinstfiles_available_quiet(void);