Add myself to OWNERS file

R=tsepez@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1133333005
diff --git a/OWNERS b/OWNERS
index 4b06587..47d804b 100644
--- a/OWNERS
+++ b/OWNERS
@@ -2,3 +2,5 @@
 jam@chromium.org
 thestig@chromium.org
 tsepez@chromium.org
+# For V8 related changes
+jochen@chromium.org