Native process WIP.
We need register context.
Work on deferring the thread updating mach exception propagation at thread update time instead of taking care of it at exception time.
Now, the thread update is driven by the Process class, and no longer managed by the NativeProcess layer.
Implements register info for darwin x86_64.

Why should we rewrite eat another one ?
- The existing LLDB implementation does not support AVX and pseudo registers.
- The DNB implementation supports AVX and pseudo register but uses debugserver specific types.
Work on register context and resume.
Fix issue when exec and new thread keep the same tid.
DoDetach stub.
Works on Halt, get Thread Name, Register Context save/restore…
Project cleanup
Detach/Kill.
Exc register set is read only.
Thread::DidStop don't have to be part of the native thread protocol.
Register Info i386
Separate pseudo register into new register sets.
Insert SSE/AVX register set after the FPU register set where it belongs.
Remove prefix header and fix include paths.
Attach asynchronously to process by name.
Tentative port of SpringBoard "wait attach"
Work on WatchPoint.
TODO: find a way to workaround a watchpoint issue:
When breaking on a watchpoint, the process is not tagged as SSTOP by the kernel, and so ptrace(detach) will return EBUSY is called.
Using existing LLDB Watch Point type macros instead of custom flags.
work on ptrace issue on OS X.
Fix a couple of issues with the Wait Attach implementation.
Implement support for detach when not SSTOP.
Reduce CPU usage in Wait Attach by avoiding requesting Args when proc name does not match.
Try to fix issue when exiting process attached.
Such process was not properly monitored, and so exit was not detected.