Patch for runtime/syntax/java.vim

[Masaya Suzuki]

Hello,

I've sent a patch to Claudio, who is the maintainer of runtime/syntax/java.vim, but there has been no response for a week, so I'll post the patch here.

I want to make a small change in runtime/syntax/java.vim.

* Support Java8's lambda syntax (the arrow mark)

* Improve method highlight

I attached the patch and some images to make the change clear. Can you review it?

Thanks,

-- masaya