Add an interpreter watchlist

WATCHLISTS

Index: WATCHLISTS
diff --git a/WATCHLISTS b/WATCHLISTS
index 858175856ffe38d27938eb0d9db6a27d9f414cf4..a5699abcf1be656ce04e4c192490e715a81da289 100644
--- a/WATCHLISTS
+++ b/WATCHLISTS
@@ -42,6 +42,11 @@
     'debugger': {
       'filepath': 'src/debug/',
     },
+    'interpreter': {
+      'filepath': 'src/interpreter/',
+      'filepath': 'test/cctest/interpreter/',
+      'filepath': 'test/unittests/interpreter/',
+    },
     'feature_shipping_status': {
       'filepath': 'src/flag-definitions.h',
     },
@@ -57,6 +62,10 @@
     'debugger': [
       'yangguo@chromium.org',
     ],
+    'interpreter': [
+      'rmcilroy@chromium.org',
+      'oth@chromium.org',
+    ],
     'feature_shipping_status': [
       'hablich@chromium.org',
     ],