Update libvorbis from 1.3.5 to 1.3.6

* Fix CVE-2018-5146 - out-of-bounds write on codebook decoding.
* Fix CVE-2017-14632 - free() on unitialized data
* Fix CVE-2017-14633 - out-of-bounds read

code/libvorbis-1.3.5/lib/codebook.h

@@ -11,7 +11,6 @@
  ********************************************************************
 
  function: basic shared codebook operations
- last mod: $Id: codebook.h 19457 2015-03-03 00:15:29Z giles $
 
  ********************************************************************/