Changes (w.r.t. Intel TBB 2017 Update 2):
- Added support for Android* 7.0 and Android* NDK r13, r13b.
- Added template class gfx_factory to the flow graph API. It implements
the Factory concept for streaming_node to offload computations to
Intel(R) processor graphics.
- Fixed a possible deadlock caused by missed wakeup signals in
Heterogeneous TBB (flow graph promotion):