[infra] Add UpdateGoDeps bot

Change-Id: I8cb78d16589b28b2965962caf7a455bf046c4b15
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/216340
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Ben Wagner aka dogben <benjaminwagner@google.com>
diff --git a/infra/bots/build_task_drivers.sh b/infra/bots/build_task_drivers.sh
new file mode 100755
index 0000000..1665deb
--- /dev/null
+++ b/infra/bots/build_task_drivers.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+# Copyright 2019 Google, LLC
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+set -x -e
+
+export GOCACHE="$(pwd)/cache/go_cache"
+export GOPATH="$(pwd)/cache/gopath"
+export GOROOT="$(pwd)/go/go"
+
+cd skia
+
+# Build task drivers from the infra repo.
+export GOBIN="${1}"
+go install -v go.skia.org/infra/infra/bots/task_drivers/update_go_deps