Cmake of rts build fails if Thread Building Blocks isn't installed

[UserAB1236872]

If you install without Intel TBB installed, and run make on the cmake build you get:

In file included from .../ELF/elf/../elf/state_collector.h:27:0,
from .../ELF/elf/../elf/comm_template.h:27,
from .../ELF/rts/game_MC/wrapper_callback.h:12,
from .../ELF/rts/game_MC/python_wrapper.cc:18:
.../ELF/elf/../elf/primitive.h:11:36: fatal error: tbb/concurrent_queue.h: No such file or directory
compilation terminated.

Looking in the file, there's a USE_TBB option that's likely not being properly detected or set. Alternatively, the error message could be improved to specify TBB as a dependency.

[qucheng]

Hi, in the main README we declare tbb as one of the dependencies.