OWNERS: Make everyone able to change *.gn,*.gni files.

Project-wide change to make it possible for all team members
to do changes to GN files.

NOTRY=True
R=kwiberg@webrtc.org
TBR=henrika@webrtc.org

Review URL: https://codereview.webrtc.org/2320043002 .

Cr-Commit-Position: refs/heads/master@{#14163}
diff --git a/webrtc/examples/OWNERS b/webrtc/examples/OWNERS
index 6e66aca..53c38ab 100644
--- a/webrtc/examples/OWNERS
+++ b/webrtc/examples/OWNERS
@@ -3,4 +3,9 @@
 perkj@webrtc.org
 tkchin@webrtc.org
 
-per-file BUILD.gn=kjellander@webrtc.org
+# These are for the common case of adding or renaming files. If you're doing
+# structural changes, please get a review from a reviewer in this file.
+per-file *.gn=*
+per-file *.gni=*
+per-file *.gyp=*
+per-file *.gypi=*