MUL instead of ADD in example program

[luisschubert]

	Example SOURCE_FILE :
		ADDI X0, XZR, #3;
		BL fact;
		B Exit;
		fact: SUBI SP, SP, #8;
		STUR LR, [SP, #4];
		STUR X0, [SP, #0];
		SUBIS X9, X0, #1;
		B.GE L1;
		ADDI X1, XZR, #1;
		ADDI SP, SP, #8;
		BR LR;
		L1: SUBI X0, X0, #1;
		BL fact;
		LDUR X0, [SP, #0];
		LDUR LR, [SP, #4];
		ADDI SP, SP, #8;
		ADD X1, X0, X1;
		BR LR;
		Exit:;

ADD X1, X0, X1; should be MUL X1, X0, X1