deps/cuda: Set the XLA_FLAGS env var
Tensorflow only detects the graka if active_cuda was called. But even if cuda detects the graphics card, it is not possible to use it in training, because libdevice.so requires to know where to find nvvm. The XLA_FLAGS tells libdevice.so where to find the nvvm folder.
PS: Probaly the same issue appears on other cuda versions
Edited by Fabian Tërnava