This moves some GN check configurations out of .gn to individual targets. The now checked target is: "//webrtc/modules/audio_processing/*", BUG=webrtc:6828 NOTRY=True R=kjellander@webrtc.org Review-Url: https://codereview.webrtc.org/2558813003 Cr-Commit-Position: refs/heads/master@{#15475}