Merge pull request #43 from jmcddn/forSESA

Hello world run as linux-gnu target on powerpc64
Make Console pure virtual

This makes way for us to add a serial console ebb for a new app
Add HelloEbb app

This app just makes a LocalConsole write (ebb call)
Merge pull request #44 from dschatzberg/forSESA

Add HelloEbb App
Implement PowerPC64 Ebb Misses

No exception handling yet
Merge pull request #45 from dschatzberg/forSESA

Implement PowerPC64 Ebb Misses
Fix for CNK

Both HelloWorld and HelloEbb work on CNK now
Merge pull request #46 from dschatzberg/forSESA

Fix for CNK
Ebb calls made from linux application.

Context must be 'Activated' to enable ebb calls. On ulnx, we no longer call in
app::start by default.