Add myself to watchlist for a few subtrees of the repo.

BUG=webrtc:4690
R=tina.legrand@webrtc.org

Review URL: https://codereview.webrtc.org/1359343003 .

Cr-Commit-Position: refs/heads/master@{#10033}

WATCHLISTS

diff --git a/WATCHLISTS b/WATCHLISTS
index 6c61b0d..24b65a2 100644
--- a/WATCHLISTS
+++ b/WATCHLISTS
@@ -102,9 +102,11 @@
                      'mflodman@webrtc.org',
                      'perkj@webrtc.org',
                      'stefan@webrtc.org',
-                     'yujie.mao@webrtc.org'],
+                     'yujie.mao@webrtc.org',
+                     'solenberg@webrtc.org'],
     'voice_engine': ['henrika@webrtc.org',
-                     'henrik.lundin@webrtc.org'],
+                     'henrik.lundin@webrtc.org',
+                     'solenberg@webrtc.org'],
     'video_capture': ['mflodman@webrtc.org',
                       'perkj@webrtc.org'],
     'video_render': ['mflodman@webrtc.org',
@@ -118,7 +120,8 @@
                          'andrew@webrtc.org',
                          'bjornv@webrtc.org',
                          'kwiberg@webrtc.org',
-                         'henrik.lundin@webrtc.org'],
+                         'henrik.lundin@webrtc.org',
+                         'solenberg@webrtc.org'],
     'video_coding': ['stefan@webrtc.org',
                      'mflodman@webrtc.org'],
     'video_processing': ['stefan@webrtc.org'],