Bazel: Automatically fix lint errors with buildifier

In recent buildifier versions, lint errors can be fixed automatically:

  $ find . \( -name BUILD -o -name "*.bzl" \) -print \
      | xargs buildifier --lint=fix

This commit was created with Buildifier version 0.19.2:

  $ buildifier --version
buildifier version: 0.19.2
buildifier scm revision: d39e4d5c25111527369142f16cdb49aa67707313

Change-Id: I1f06cd4596e794981ccc2d9fc2d1da9b17f3973a

lib/fonts/BUILD

@@ -1,5 +1,3 @@
-load("//tools/bzl:genrule2.bzl", "genrule2")
-
 # Source Code Pro. Version 2.010 Roman / 1.030 Italics
 # https://github.com/adobe-fonts/source-code-pro/releases/tag/2.010R-ro%2F1.030R-it
 filegroup(

lib/jgit/jgit.bzl

@@ -1,4 +1,4 @@
-load("//tools/bzl:maven_jar.bzl", "GERRIT", "MAVEN_CENTRAL", "MAVEN_LOCAL", "maven_jar")
+load("//tools/bzl:maven_jar.bzl", "MAVEN_CENTRAL", "maven_jar")
 
 _JGIT_VERS = "4.7.6.201810191618-r"
 

lib/js/BUILD

@@ -1,6 +1,7 @@
-package(default_visibility = ["//visibility:public"])
+load("//lib/js:bower_components.bzl", "define_bower_components")
+load("//tools/bzl:js.bzl", "js_component")
 
-load("//tools/bzl:js.bzl", "bower_component", "js_component")
+package(default_visibility = ["//visibility:public"])
 
 # For importing new versions of existing bower packages,
 #
@@ -20,8 +21,6 @@ load("//tools/bzl:js.bzl", "bower_component", "js_component")
 # 4) remove bower_component(name="my_new_dependency", .. ) here
 #
 
-load("//lib/js:bower_components.bzl", "define_bower_components")
-
 define_bower_components()
 
 js_component(

lib/lucene/BUILD

@@ -1,7 +1,7 @@
-package(default_visibility = ["//visibility:public"])
-
 load("//tools/bzl:maven.bzl", "merge_maven_jars")
 
+package(default_visibility = ["//visibility:public"])
+
 # core and backward-codecs both provide
 # META-INF/services/org.apache.lucene.codecs.Codec, so they must be merged.
 merge_maven_jars(

lib/polymer_externs/BUILD

@@ -12,10 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-package(default_visibility = ["//visibility:public"])
-
 load("@io_bazel_rules_closure//closure:defs.bzl", "closure_js_library")
 
+package(default_visibility = ["//visibility:public"])
+
 closure_js_library(
     name = "polymer_closure",
     srcs = ["@polymer_closure//file"],