Move NewGRF sprite dump declarations to new header file

src/table/newgrf_debug_data.h

@@ -27,6 +27,7 @@
 #include "../tunnelbridge.h"
 #include "../train_speed_adaptation.h"
 #include "../tracerestrict.h"
+#include "../newgrf_dump.h"
 
 /* Helper for filling property tables */
 #define NIP(prop, base, variable, type, name) { name, (ptrdiff_t)cpp_offsetof(base, variable), cpp_sizeof(base, variable), prop, type }