Add support for building Multi-Release JARs

### Description of the problem / feature request:

Add support for building [JEP 238](http://openjdk.java.net/jeps/238)-compliant jars for distribution.

### Feature requests: what underlying problem are you trying to solve with this feature?

* http://openjdk.java.net/jeps/238#Motivation.
* https://github.com/protocolbuffers/protobuf/issues/3781 is one concrete example of a desire for JEP 238 support in Bazel.

Issue 中没有指定文件、测试或入口点。先阅读 JEP 238 和链接的 protobuf issue，以了解所需的分发行为，然后检查仓库的 Java 构建规则和测试。当这些规则能够生成符合 JEP 238 的多版本 JAR，并为受支持的用例提供覆盖时，即视为完成。

由索引模型根据 Issue 内容生成。