Various bugfixes

- Add error msg for what fails in a particular ini boot entry
- Fix wrongly defined s8 type
- Change raw fuse dump to correct size

bootloader/storage/nx_emmc.h

@@ -59,7 +59,7 @@ typedef struct _emmc_part_t
 	u32 lba_start;
 	u32 lba_end;
 	u64 attrs;
-	s8 name[37];
+	char name[37];
 	link_t link;
 } emmc_part_t;