Updating Opus to a pre-release of 1.1

This CL updates Opus to a pre-release of the coming Opus 1.1 version. The code is extracted from http://git.xiph.org/?p=opus.git, commit aee4d8057632ea0cfc1d55d88acf8466b47b7b4b from October 1st 2013.
This version includes both algorithmic and platform optimizations, as well an important fix for a denorm problem when the input goes silent after active audio. The problem causes high CPU usage.

Review URL: https://codereview.chromium.org/28553003

git-svn-id: svn://svn.chromium.org/chrome/trunk/deps/third_party/opus@230378 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/celt/vq.h b/celt/vq.h
index 1ceeeeb..ffdc69c 100644
--- a/celt/vq.h
+++ b/celt/vq.h
@@ -40,11 +40,9 @@
 /** Algebraic pulse-vector quantiser. The signal x is replaced by the sum of
   * the pitch and a combination of pulses such that its norm is still equal
   * to 1. This is the function that will typically require the most CPU.
- * @param x Residual signal to quantise/encode (returns quantised version)
- * @param W Perceptual weight to use when optimising (currently unused)
+ * @param X Residual signal to quantise/encode (returns quantised version)
  * @param N Number of samples to encode
  * @param K Number of pulses to use
- * @param p Pitch vector (it is assumed that p+x is a unit vector)
  * @param enc Entropy encoder state
  * @ret A mask indicating which blocks in the band received pulses
 */
@@ -56,10 +54,9 @@
       );
 
 /** Algebraic pulse decoder
- * @param x Decoded normalised spectrum (returned)
+ * @param X Decoded normalised spectrum (returned)
  * @param N Number of samples to decode
  * @param K Number of pulses to use
- * @param p Pitch vector (automatically added to x)
  * @param dec Entropy decoder state
  * @ret A mask indicating which blocks in the band received pulses
  */