* Dynamically select the `-cl-std` option on the basic `sizeof` and
`wg_barrier` tests to be one of `CL1.X`, `CL2.0` or `CL3.0`.
Use the most recent CL C standard supported on the device.
They are duplicate functions
Fixes#709
Change-Id: I8f7d6b8254047adb9e09ede4951dedc3ec5c1099
Signed-off-by: Ellen Norris-Thompson <ellen.norris-thompson@arm.com>