Revert "build buildifier not using bazel cause i cannot make it work"

This reverts commit b69ad5a.

Signed-off-by: Chris Koch <chrisko@google.com>

.circleci/config.yml

@@ -298,12 +298,10 @@ jobs:
       - run:
           name: run buildifier
           command: |
-            go install github.com/bazelbuild/buildtools/buildifier@latest
-            buildifier -r .
-            #bazel run :buildifier -- -r .
+            bazel run :buildifier -- -r .
             git status
             if [[ -n "$(git status --porcelain .)" ]]; then
-              echo 'BUILD files are out-of-date: run `buildifier -r .` and then check in the changes'
+              echo 'BUILD files are out-of-date: run `bazel run :buildifier -- -r .` and then check in the changes'
               git status --porcelain .
               exit 1
             fi

BUILD.bazel

@@ -1,4 +1,5 @@
 load("@bazel_gazelle//:def.bzl", "gazelle")
+load("@com_github_bazelbuild_buildtools//buildifier:def.bzl", "buildifier")
 
 # gazelle:exclude test
 # gazelle:exclude vendortest
@@ -8,3 +9,7 @@ load("@bazel_gazelle//:def.bzl", "gazelle")
 gazelle(
     name = "gazelle",
 )
+
+buildifier(
+    name = "buildifier",
+)