Add more define constants for file magics.

source/3ds/cbmd.cpp

@@ -5,6 +5,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define CBMD_MAGIC "CBMD"
+
 typedef struct {
     char magic[4];
     u32 zero;
@@ -17,7 +19,7 @@ static void* cbmd_build_data(u32* size, CBMD cbmd, bool bnr) {
     CBMDHeader header;
     memset(&header, 0, sizeof(header));
 
-    memcpy(header.magic, "CBMD", sizeof(header.magic));
+    memcpy(header.magic, CBMD_MAGIC, sizeof(header.magic));
 
     u32 outputSize = sizeof(CBMDHeader);
 

source/3ds/smdh.h

@@ -3,6 +3,8 @@
 
 #include "../types.h"
 
+#define SMDH_MAGIC "SMDH"
+
 #define SMDH_NUM_LANGUAGE_SLOTS 16
 #define SMDH_NUM_VALID_LANGUAGE_SLOTS 12