Add dxie to mash buildbot filter file watchlist

Bug: none
Change-Id: I3d309fe29f678504b86062abcb09d803a1f10348
Reviewed-on: https://chromium-review.googlesource.com/1070413
Reviewed-by: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562479}
diff --git a/WATCHLISTS b/WATCHLISTS
index 70bab007..7d89f71 100644
--- a/WATCHLISTS
+++ b/WATCHLISTS
@@ -2144,7 +2144,8 @@
     'login': ['vabr+watchlistlogin@chromium.org'],
     'mac' : ['mac-reviews@chromium.org'],
     'manifest': ['mlamouri+watch-manifest@chromium.org'],
-    'mash_buildbot_filters': ['jamescook+watch@chromium.org'],
+    'mash_buildbot_filters': ['dxie+watch@chromium.org',
+                              'jamescook+watch@chromium.org'],
     'md_settings': ['michaelpg+watch-md-settings@chromium.org',
                     'stevenjb+watch-md-settings@chromium.org'],
     'media': ['feature-media-reviews@chromium.org'],