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

lib/gwt/BUILD

@@ -1,45 +1,45 @@
 [java_library(
-  name = n,
-  exports = ['@%s//jar' % n.replace("-", "_")],
-  visibility = ["//visibility:public"],
-  data = ['//lib:LICENSE-Apache2.0'],
+    name = n,
+    data = ["//lib:LICENSE-Apache2.0"],
+    visibility = ["//visibility:public"],
+    exports = ["@%s//jar" % n.replace("-", "_")],
 ) for n in [
-  'ant',
-  'colt',
-  'dev',
-  'javax-validation',
-  'jsinterop-annotations',
-  'tapestry',
-  'user',
-  'w3c-css-sac',
+    "ant",
+    "colt",
+    "dev",
+    "javax-validation",
+    "jsinterop-annotations",
+    "tapestry",
+    "user",
+    "w3c-css-sac",
 ]]
 
 java_library(
-  name = 'user-neverlink',
-  exports = ['@user//jar'],
-  visibility = ['//visibility:public'],
-  neverlink = 1,
-  data = ['//lib:LICENSE-Apache2.0'],
+    name = "user-neverlink",
+    data = ["//lib:LICENSE-Apache2.0"],
+    neverlink = 1,
+    visibility = ["//visibility:public"],
+    exports = ["@user//jar"],
 )
 
 java_library(
-  name = 'dev-neverlink',
-  exports = ['@dev//jar'],
-  visibility = ['//visibility:public'],
-  neverlink = 1,
-  data = ['//lib:LICENSE-Apache2.0'],
+    name = "dev-neverlink",
+    data = ["//lib:LICENSE-Apache2.0"],
+    neverlink = 1,
+    visibility = ["//visibility:public"],
+    exports = ["@dev//jar"],
 )
 
 java_library(
-  name = 'javax-validation_src',
-  exports = ['@javax_validation//jar:src'],
-  visibility = ['//visibility:public'],
-  data = ['//lib:LICENSE-Apache2.0'],
+    name = "javax-validation_src",
+    data = ["//lib:LICENSE-Apache2.0"],
+    visibility = ["//visibility:public"],
+    exports = ["@javax_validation//jar:src"],
 )
 
 java_library(
-  name = 'jsinterop-annotations_src',
-  exports = ['@jsinterop_annotations//jar:src'],
-  visibility = ['//visibility:public'],
-  data = ['//lib:LICENSE-Apache2.0'],
+    name = "jsinterop-annotations_src",
+    data = ["//lib:LICENSE-Apache2.0"],
+    visibility = ["//visibility:public"],
+    exports = ["@jsinterop_annotations//jar:src"],
 )