depot_tools: Include vpython in cipd bundle.

Tbr: iannucci@chromium.org
Bug: 984182
Change-Id: I01b0e12179d2314c48c00d74550ceea1e32b355d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1749844
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>

.gitattributes

@@ -10,7 +10,7 @@
 /*.sh  recipes
 
 # vpython and vpython specs
-/vpython*
+/vpython*       recipes
 /gsutil.vpython recipes
 /.vpython       recipes