fix undefined references after merge

src/engine/cable_club.c

@@ -321,7 +321,7 @@ void debug_sub_808A55C()
 	mov	r2, #0xc\n\
 	mov	r3, #0x1\n\
 	bl	PrintHex\n\
-	bl	sub_8007ECC\n\
+	bl	IsLinkTaskFinished\n\
 	lsl	r0, r0, #0x18\n\
 	lsr	r0, r0, #0x18\n\
 	mov	r1, #0xf\n\

src/engine/mystery_event_menu.c

@@ -697,7 +697,7 @@ void debug_sub_815D1D8()
         "	.word	0x43c\n"
         "._149:\n"
         "	bl	Menu_UpdateWindowText\n"
-        "	bl	sub_8007ECC\n"
+        "	bl	IsLinkTaskFinished\n"
         "	lsl	r0, r0, #0x18\n"
         "	cmp	r0, #0\n"
         "	beq	._196	@cond_branch\n"