lambda repo merged with jdk8 mainline repo

[Mike Duigou]

Hello Lamdanites!

I have completed a merge with the jdk 8 mainline repository (http://hg.openjdk.java.net/jdk8/jdk8). The langtools repository was not merged because this time because Maurizio is manually managing differences between the langtools lambda and mainline repos. 

There will be another set of binaries built from the default lambda branch before the "it2-bootstrap" branch is merged as the default.

In the meantime, for those who build openjdk themselves, enjoy the much faster build times provided by the updated new build infrastructure.

Mike