Adding GYP/GN owners to stats/ aligning with all other dirs.
Adding GYP/GN owners to stats/ aligning with all other dirs.

TBR=hbos@webrtc.org

Review URL: https://codereview.webrtc.org/2279313004 .

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#13941}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: b4677de9b06636fe2b1715b3525b72ceca1664c6

Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk