[Beignet] cl_ext.h vs cl_ext_intel.h

[Rebecca N. Palmer]

Some Intel-specific extensions (e.g. cl_intel_accelerator) are in 
cl_ext.h in Beignet's included OpenCL headers, but in cl_ext_intel.h in 
the upstream (Khronos) OpenCL headers:
https://github.com/KhronosGroup/OpenCL-Headers/tree/master/CL

What are your plans here?  (This is an API change for users of these 
extensions, but there does not appear to be any such code in Debian 
outside beignet itself.)

Debian is currently using this workaround to build beignet with Khronos 
headers:
https://salsa.debian.org/opencl-team/beignet/blob/master/debian/patches/cl_accelerator_intel.patch