[SYCL] Disable two failing tests (intel/llvm-test-suite#277)

* [SYCL] Disable two failing tests.

Author: dm-vodopyanov

SYCL/ESIMD/private_memory/pm_access_1.cpp

@@ -8,6 +8,6 @@
 
 // REQUIRES: gpu
 // Sporadic failure in GPU RT 21.16.19610
-// UNSUPPORTED: cuda || (level_zero && linux)
+// UNSUPPORTED: cuda || (level_zero && linux) || (opencl && linux)
 // RUN: %clangxx -fsycl -I%S/.. %S/Inputs/pm_common.cpp -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out 1

SYCL/Reduction/reduction_nd_ext_half.cpp

@@ -1,3 +1,6 @@
+// Sporadic failure
+// UNSUPPORTED: opencl && windows
+
 // RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple %s -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out