In a scenario where fp64 emulation is both supported and enabled,
we want to include 2 additional extensions:
- cl_khr_fp64 to deviceExtensions
- __opencl_c_fp64 to openclCFeatures (OpenCL ver. 3.0)
Related-To: NEO-7611
Signed-off-by: Fabian Zwolinski <fabian.zwolinski@intel.com>