Buildify all the build files

We are slowly upgrading them all.  Bite bullet and do the rest of them.

Change-Id: I15744cf1b0dc1954954e131b35228c98247c92fe
diff --git a/aos/vision/download/BUILD b/aos/vision/download/BUILD
index 536a7ad..f22c18b 100644
--- a/aos/vision/download/BUILD
+++ b/aos/vision/download/BUILD
@@ -1,7 +1,7 @@
 py_binary(
-  name = 'downloader',
-  visibility = ['//visibility:public'],
-  srcs = [
-    'downloader.py',
-  ],
+    name = "downloader",
+    srcs = [
+        "downloader.py",
+    ],
+    visibility = ["//visibility:public"],
 )