Add sync-apm.sh script

Use this script to copy the source code of audio processing
module and its dependencies from WebRTC upstream.

This script also corrects the libevent header path to use the
CrOS build version.

BUG=chromium:710465
TEST=fetch webrtc project then run
./script/sync-apm.sh  ~/webrtc-checkout/src .

Change-Id: Idfdbfbf1cc0ae90c70e947c8a673a53291fe3a30
Reviewed-on: https://chromium-review.googlesource.com/970196
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Hsinyu Chao <hychao@chromium.org>
Reviewed-by: Cheng-Yi Chiang <cychiang@chromium.org>
1 file changed
tree: 0eef516bd9dc9814038f0f0ae7493fa9170f77c2
  1. script/