audiofile: add security patch for CVE-2017-6830 / CVE-2017-6834 / CVE-2017-6836 ...

audiofile: add security patch for CVE-2017-6830 / CVE-2017-6834 / CVE-2017-6836 / CVE-2017-6838

CVE-2017-6830: A heap-based buffer overflow in the alaw2linear_buf function
in G711.cpp in Audio File Library (aka audiofile) 0.3.6 allows remote
attackers to cause a denial of service (crash) via a crafted file.

https://blogs.gentoo.org/ago/2017/02/20/audiofile-heap-based-buffer-overflow-in-alaw2linear_buf-g711-cpp
https://github.com/mpruett/audiofile/issues/34

CVE-2017-6834: A heap-based buffer overflow in the ulaw2linear_buf function
in G711.cpp in Audio File Library (aka audiofile) 0.3.6 allows remote
attackers to cause a denial of service (crash) via a crafted file.

https://blogs.gentoo.org/ago/2017/02/20/audiofile-heap-based-buffer-overflow-in-ulaw2linear_buf-g711-cpp
https://github.com/mpruett/audiofile/issues/38

CVE-2017-6836: A heap-based buffer overflow in the Expand3To4Module::run
function in libaudiofile/modules/SimpleModule.h in Audio File Library (aka
audiofile) 0.3.6 allows remote attackers to cause a denial of service
(crash) via a crafted file.

https://blogs.gentoo.org/ago/2017/02/20/audiofile-heap-based-buffer-overflow-in-expand3to4modulerun-simplemodule-h
https://github.com/mpruett/audiofile/issues/40

CVE-2017-6838: Integer overflow in sfcommands/sfconvert.c in Audio File
Library (aka audiofile) 0.3.6 allows remote attackers to cause a denial of
service (crash) via a crafted file.

https://blogs.gentoo.org/ago/2017/02/20/audiofile-multiple-ubsan-crashes/
https://github.com/mpruett/audiofile/issues/41

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>