Add support for build options available only after a certain version:
- -cl-uniform-work-group-size after 2.0
- -cl-no-subgroup-ifp after 2.1
Add specific test for cl-uniform-work-group-size
- Check that test can be executed when work group size is uniform.
- Check that test returns the proper error code when work group size is
not uniform.
Ref #2563
* Fix implicit int->float warning inside kernel
This kernel is used to test various compiler options including
-Werror. Some compilers produce a warning about the implicit
conversion which results in this test failing when -Werror is used.
* Fix formatting
