add greg to gameplay stats (#2544)

Co-authored-by: briaguya <briaguya>

soh/src/code/z_parameter.c

@@ -2581,6 +2581,7 @@ u16 Randomizer_Item_Give(PlayState* play, GetItemEntry giEntry) {
     if (item == RG_GREG_RUPEE) {
         Rupees_ChangeBy(1);
         Flags_SetRandomizerInf(RAND_INF_GREG_FOUND);
+        gSaveContext.sohStats.timestamp[TIMESTAMP_FOUND_GREG] = GAMEPLAYSTAT_TOTAL_TIME;
         return RG_NONE;
     }