libwvm.so: be more descriptive with error message.

  libwvm.so is only needed if building widevine drm. However,
  the error can be deceiving, so lets make it a bit more
  verbose(??).

Signed-off-by: KhasMek <Boushh@gmail.com>
libstagefright: remove duplicate call for alacdec decoder

Signed-off-by: KhasMek <Boushh@gmail.com>
audio_affects: remove libs we don't build.

  We don't build srs or ds affect libs, lets not clog up
  our logs reminding us about it.

Signed-off-by: KhasMek <Boushh@gmail.com>