* gnu/packages/opencl.scm (pocl): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/opencl.scm (beignet): New variable.
* gnu/packages/patches/beignet-correct-file-names.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/opencl.scm (clinfo): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/opencl.scm (ocl-icd): New variable.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/opencl.scm (opencl-clhpp): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/opencl.scm: New file.
(make-opencl-headers): New function.
(opencl-headers-2.2, opencl-headers-2.1, opencl-headers-2.0,
opencl-headers-1.2, opencl-headers-1.1, opencl-headers-1.0, opencl-headers):
New variables.

* gnu/local.mk: Add the new file.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>