Bazel: Reformat build files

Reformat the Bazel build files with the buildifier tool [1].

The style is different for Bazel files. Most notably, indentation level
is 4 spaces instead of 2, and " is used instead of '.

[1] https://github.com/bazelbuild/buildifier

Change-Id: I95c0c6f11b6d76572797853b4ebb5cee5ebd3c98
diff --git a/lib/auto/BUILD b/lib/auto/BUILD
index c50c105..569398e 100644
--- a/lib/auto/BUILD
+++ b/lib/auto/BUILD
@@ -1,22 +1,22 @@
 java_plugin(
-  name = 'auto-annotation-plugin',
-  processor_class = 'com.google.auto.value.processor.AutoAnnotationProcessor',
-  deps = ['@auto_value//jar'],
+    name = "auto-annotation-plugin",
+    processor_class = "com.google.auto.value.processor.AutoAnnotationProcessor",
+    deps = ["@auto_value//jar"],
 )
 
 java_plugin(
-  name = 'auto-value-plugin',
-  processor_class = 'com.google.auto.value.processor.AutoValueProcessor',
-  deps = ['@auto_value//jar'],
+    name = "auto-value-plugin",
+    processor_class = "com.google.auto.value.processor.AutoValueProcessor",
+    deps = ["@auto_value//jar"],
 )
 
 java_library(
-  name = 'auto-value',
-  exported_plugins = [
-    ':auto-annotation-plugin',
-    ':auto-value-plugin',
-  ],
-  exports = ['@auto_value//jar'],
-  visibility = ['//visibility:public'],
-  data = ['//lib:LICENSE-Apache2.0'],
+    name = "auto-value",
+    data = ["//lib:LICENSE-Apache2.0"],
+    exported_plugins = [
+        ":auto-annotation-plugin",
+        ":auto-value-plugin",
+    ],
+    visibility = ["//visibility:public"],
+    exports = ["@auto_value//jar"],
 )