config: Add bootloader protection

`bootprotect=1` enables protection of the `bootloader` folder inside HOS.

This disallows any reading/writing of the folder and its contents inside HOS, preventing any corruption of it.

This of course has the side-effect of homebrew that depend on it (e.g. hekate Toolbox) to not work fully.

bootloader/config.h

@@ -30,8 +30,7 @@ typedef struct _hekate_config
 	u32 autohosoff;
 	u32 autonogc;
 	u32 updater2p;
-	char *brand;
-	char *tagline;
+	u32 bootprotect;
 	// Global temporary config.
 	bool se_keygen_done;
 	bool sept_run;