[wasm] wasm WATCHLISTS

Improve visibility within the distributed wasm team.
Created wasm watchlist, and added wasm-team - the union of
MUC and MTV wasm teams.

BUG=

Review-Url: https://codereview.chromium.org/2759053002
Cr-Commit-Position: refs/heads/master@{#43959}

WATCHLISTS

@@ -66,6 +66,10 @@
     'inspector': {
       'filepath': 'inspector',
     },
+    'wasm': {
+      'filepath': 'src/wasm/' \
+                  '|src/compiler/wasm',
+    },
   },
 
   'WATCHLISTS': {
@@ -102,5 +106,8 @@
     'inspector': [
       'devtools-reviews@chromium.org',
     ],
+    'wasm': [
+      'wasm-v8@google.com',
+    ],
   },
 }