Add myself (nisse@) as owner of system_wrappers/.

Notry: true
Bug: none
Change-Id: I69494318819f3b697c7fb9a6ec43159bcbf81688
Reviewed-on: https://webrtc-review.googlesource.com/39921
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21645}
diff --git a/system_wrappers/OWNERS b/system_wrappers/OWNERS
index ca99100..65b8dee 100644
--- a/system_wrappers/OWNERS
+++ b/system_wrappers/OWNERS
@@ -3,6 +3,7 @@
 henrikg@webrtc.org
 mflodman@webrtc.org
 niklas.enbom@webrtc.org
+nisse@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.