[CVE-2017-18207]Improve exceptions in aifc, wave and sunau.

[CVE-2017-18207]Improve exceptions in aifc, wave and sunau.

** DISPUTED ** The Wave_read._read_fmt_chunk function
in Lib/wave.py in Python through 3.6.4 does not ensure
a nonzero channel value, which allows attackers to cause
a denial of service (divide-by-zero and exception) via
a crafted wav format audio file. NOTE: the vendor disputes
this issue because Python applications "need
to be prepared to handle a wide variety of exceptions."

Change-Id: Ia7b958c4d95596552802eda52f257fcc3fcc7469
Signed-off-by: JinWang An <jinwang.an@samsung.com>