Import buildifier

This patch sets up buildifier to run as part of CI. It can also be run
manually via `//tools/lint:buildifier`.

As a consequence, I needed to make the whole repo conform.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: Ic41c97b17255813b6c21aef40ab2f8a216683a2c
diff --git a/aos/actions/BUILD b/aos/actions/BUILD
index 90588ca..1905e9c 100644
--- a/aos/actions/BUILD
+++ b/aos/actions/BUILD
@@ -1,8 +1,8 @@
-package(default_visibility = ["//visibility:public"])
-
 load("@com_github_google_flatbuffers//:build_defs.bzl", "flatbuffer_cc_library")
 load("//aos:config.bzl", "aos_config")
 
+package(default_visibility = ["//visibility:public"])
+
 cc_library(
     name = "action_lib",
     srcs = [
diff --git a/aos/network/www/BUILD b/aos/network/www/BUILD
index 5b951bd..64d7452 100644
--- a/aos/network/www/BUILD
+++ b/aos/network/www/BUILD
@@ -1,5 +1,5 @@
 load("@npm_bazel_typescript//:defs.bzl", "ts_library")
-load("@build_bazel_rules_nodejs//:defs.bzl", "nodejs_binary", "rollup_bundle")
+load("@build_bazel_rules_nodejs//:defs.bzl", "rollup_bundle")
 load("//aos:config.bzl", "aos_config")
 
 filegroup(
diff --git a/aos/vision/image/BUILD b/aos/vision/image/BUILD
index 054b262..63be82c 100644
--- a/aos/vision/image/BUILD
+++ b/aos/vision/image/BUILD
@@ -1,7 +1,7 @@
-package(default_visibility = ["//visibility:public"])
-
 load("@com_google_protobuf//:protobuf.bzl", "cc_proto_library")
 
+package(default_visibility = ["//visibility:public"])
+
 cc_library(
     name = "image_types",
     hdrs = ["image_types.h"],
diff --git a/aos/vision/tools/BUILD b/aos/vision/tools/BUILD
index 4be7fd7..baaf762 100644
--- a/aos/vision/tools/BUILD
+++ b/aos/vision/tools/BUILD
@@ -1,4 +1,4 @@
-load("//tools/build_rules:gtk_dependent.bzl", "gtk_dependent_cc_binary", "gtk_dependent_cc_library")
+load("//tools/build_rules:gtk_dependent.bzl", "gtk_dependent_cc_binary")
 
 gtk_dependent_cc_binary(
     name = "jpeg_vision_test",