clover: Pass device to llvm::create_compiler_instance

clover: Pass device to llvm::create_compiler_instance

We'll be using dev.device_clc_version to select the default language version
soon along with the existing ir_target field.

Signed-off-by: Aaron Watry <awatry@gmail.com>
Reviewed-by: Pierre Moreau <pierre.morrow@free.fr>
Reviewed-by: Jan Vesely <jan.vesely@rutgers.edu>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
v4: Pass the device down instead of device_clc_version as a separate field
v3: Revise to acknowledge that we now have the device in compile/link_program
    instead of the string values.
v2: (Pierre) Move changes to create_compiler_instance invocation to correct
    patch to prevent temporary build breakage.
    (Jan) Use device_clc_version instead of device_version for compile/link