* current source is based on libopus 1.1.3 stable (http://downloads.xiph.org/releases/opus/opus-1.1.3.tar.gz)
* libopus is BSD-licensed - http://www.opus-codec.org/license/

Updating:
* Run "convert_android_asm.sh" from the root of the library (external/libopus).
  This uses 'arm2gnu.pl' included in libopus to convert ARM ASM files to GNU ASM
  files for building under the Android NDK.