Add //.vpython as a data dep for perfetto uploader.

The upload_trace_processor step on the perfetto bots has
been failing on Windows since a change that changed how
vpython dependencies were packaged landed.

This CL adds what I believe to be a missing data dependency
on //.vpython that will hopefully fix the problem.

Bug: 1122953
Change-Id: I7b42278bf1a1177b36e2547d0737cc9288c289e3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2536819Reviewed-by: Mikhail Khokhlov <khokhlov@google.com>
Commit-Queue: Dirk Pranke <dpranke@google.com>
Cr-Commit-Position: refs/heads/master@{#827986}

tools/perf/core/perfetto_binary_roller/BUILD.gn

@@ -13,6 +13,7 @@ generate_wrapper("upload_trace_processor") {
   data = [
     "//tools/perf/core/",
     "//DEPS",
+    "//.vpython",
   ]
 
   if (is_win) {