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/jgit/org.eclipse.jgit.http.server/BUILD

@@ -1,7 +1,7 @@
 java_library(
-  name = 'jgit-servlet',
-  exports = ['@jgit_servlet//jar'],
-  runtime_deps = ['//lib/jgit/org.eclipse.jgit:jgit'],
-  visibility = ['//visibility:public'],
-  data = ['//lib:LICENSE-jgit'],
+    name = "jgit-servlet",
+    data = ["//lib:LICENSE-jgit"],
+    visibility = ["//visibility:public"],
+    exports = ["@jgit_servlet//jar"],
+    runtime_deps = ["//lib/jgit/org.eclipse.jgit:jgit"],
 )