[PATCH] relational: Implement shuffle2 builtin

This was added in CL 1.1

Tested with a Radeon HD 7850 (Pitcairn) using the CL CTS via:
test_conformance/relationals/test_relationals shuffle_built_in_dual_input

Signed-off-by: Aaron Watry <awatry@gmail.com>

ping.

This was added in CL 1.1

Tested with a Radeon HD 7850 (Pitcairn) using the CL CTS via:
test_conformance/relationals/test_relationals shuffle_built_in_dual_input

Signed-off-by: Aaron Watry <awatry@gmail.com>

similar to the other one. If you add half/cl_khr_fp16 version and move
this to clc/misc:
Reviewed-by: Jan Vesely <jan.vesely@rutgers.edu>

this one works on Turks as well.

Jan