Jetpack: Bump to v3.2-beta1

For detailed changelog: https://github.com/Automattic/jetpack/compare/3.1.1...3.2-beta1


git-svn-id: https://plugins.svn.wordpress.org/jetpack/trunk@1003386 b8457f37-d9ea-0310-8a92-e5e31aec5664