Some graphics APIs want the ability to create and use timelines
with 64 bit sequence numbers to synchronize between threads.

Add support for timelines that can be created, signaled and managed from
user space. Timelines can also be signaled from a draw context command
stream via an auxiliary command and a wait can be added as a sync object
to any GPU command.

Change-Id: Ic0dedbad0ffc99cc309951369eaf85b56727802c
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>