package/libsndfile: add upstream security fixes

package/libsndfile: add upstream security fixes

- Fix CVE-2017-6892: In libsndfile version 1.0.28, an error in the
  "aiff_read_chanmap()" function (aiff.c) can be exploited to cause an
  out-of-bounds read memory access via a specially crafted AIFF file.

- Fix CVE-2017-8361: The flac_buffer_copy function in flac.c in
  libsndfile 1.0.28 allows remote attackers to cause a denial of service
  (buffer overflow and application crash) or possibly have unspecified
  other impact via a crafted audio file.

- Fix CVE-2017-8362: The flac_buffer_copy function in flac.c in
  libsndfile 1.0.28 allows remote attackers to cause a denial of service
  (invalid read and application crash) via a crafted audio file.

- Fix CVE-2017-8363: The flac_buffer_copy function in flac.c in
  libsndfile 1.0.28 allows remote attackers to cause a denial of service
  (heap-based buffer over-read and application crash) via a crafted
  audio file.

- Fix CVE-2017-8365: The i2les_array function in pcm.c in
  libsndfile 1.0.28 allows remote attackers to cause a denial of service
  (buffer over-read and application crash) via a crafted audio file.

- Fix CVE-2017-12562: Heap-based Buffer Overflow in the
  psf_binheader_writef function in common.c in libsndfile through 1.0.28
  allows remote attackers to cause a denial of service (application
  crash) or possibly have unspecified other impact.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>