Add ToTWinOfficial to chromium.clang console as well

The new ToTWinOfficial bot was previously added only to the
luci.chromium.clang console. This change adds it to the chromium.clang
console, as well.

R=hans,hinoka,tikuta

Bug: 950746
Change-Id: I6f26c2d8751a0c9a577cdc30177b7471f507748f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1579780Reviewed-by: Ryan Tseng <hinoka@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Bob Haarman <inglorion@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653429}

infra/config/luci-milo.cfg

@@ -1857,6 +1857,11 @@ consoles {
     category: "ToT Windows"
     short_name: "rel"
   }
+  builders {
+    name: "buildbucket/luci.chrome.ci/ToTWinOfficial"
+    category: "ToT Windows"
+    short_name: "ofi"
+  }
   builders {
     name: "buildbucket/luci.chromium.ci/ToTWin(dbg)"
     category: "ToT Windows"