[SYCL] Temporarily disable spec_const_hw.cpp on CPU.

CPU OpenCL Runtime on build machines is not updated yet.

Signed-off-by: Konstantin S Bobrovsky <[email protected]>

Author: kbobrovs

sycl/test/spec_const/spec_const_hw.cpp

@@ -1,7 +1,7 @@
 // RUN: %clangxx -fsycl %s -o %t.out
 // RUN: env SYCL_DEVICE_TYPE=HOST %t.out
-// RUN: %CPU_RUN_PLACEHOLDER %t.out
 // TODO: re-enable after OpenCL RT is fixed:
+// RUNx: %CPU_RUN_PLACEHOLDER %t.out
 // RUNx: %GPU_RUN_PLACEHOLDER %t.out
 // RUNx: %ACC_RUN_PLACEHOLDER %t.out
 //