audiofile: Update 0.2.6 to 0.2.7

0.2.7 fixes various bugs of 0.2.6 and adds further support for WAVE and AIFF-C
formats.

Drop patches:
* CVE-2008-5824 is already fixed in 0.2.7 (patch has just been a workaround):
  https://github.com/mpruett/audiofile/commit/e8cf0095b3f319739f9aa1ab5a1aa52b76be8cdd


* oldstyle patch is not needed , since current toolchain compiles C files
  with old style function declarations
* audiofile-0.2.6 patch is already applied in 0.2.7
* audiofile-m4_quote_fix is already applied in 0.2.7

Signed-off-by: Michael Lippautz <michael.lippautz@gmail.com>