BR 3392538: test case for double free in listing module

Test case from bug 3392538 for double free in the listing module.

This is the test case only, not a fix.

Reported-by: <russyz@comcast.net>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

test/br3392538.asm

@@ -0,0 +1,27 @@
+	bits 64
+	default	rel
+
+	section	.text
+	global	_start
+_start:
+
+	mov	rax, 1	; write syscall
+	mov	rdi, 1
+	mov	rsi, msg
+	mov	rdx, msglen 
+	syscall
+
+	mov	rax, 60	; exit syscall
+	sub	rdi, rdi
+	syscall
+
+; either of the following lines cause: Error in `nasm': double free or corruption ; Aborted (core dumped)
+foo
+; warning: label alone on a line without a colon might be in error [-w+orphan-labels]
+	mov	r8, r9, r10
+; error: invalid combination of opcode and operands
+	add	r8d, byte 80h
+; warning: signed byte value exceeds bounds [-w+number-overflow]
+	section	.data
+msg	db	"Hello, world!", 10
+msglen	equ	$-msg