Add surenb@ to libprocessgroup OWNERS

Test: n/a

Change-Id: Ia671384e4202f618d0ae08bc33f0ca8bbd9e53c1
diff --git a/libprocessgroup/OWNERS b/libprocessgroup/OWNERS
index bfa730a..27b9a03 100644
--- a/libprocessgroup/OWNERS
+++ b/libprocessgroup/OWNERS
@@ -1,2 +1,3 @@
 ccross@google.com
+surenb@google.com
 tomcherry@google.com