XFAIL tests only on linux

Author: vladimirlaz

SYCL/ESIMD/private_memory/pm_access_1.cpp

@@ -11,4 +11,4 @@
 // RUN: %clangxx -fsycl -I%S/.. %S/Inputs/pm_common.cpp -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out 1
 // Regression in GPU RT 21.16.19610
-// XFAIL: level_zero
+// XFAIL: level_zero && linux

SYCL/ESIMD/private_memory/pm_access_2.cpp

@@ -11,4 +11,4 @@
 // RUN: %clangxx -fsycl -I%S/.. %S/Inputs/pm_common.cpp -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out 2
 // Regression in GPU RT 21.16.19610
-// XFAIL: level_zero
+// XFAIL: level_zero && linux

SYCL/ESIMD/private_memory/pm_access_3.cpp

@@ -11,4 +11,4 @@
 // RUN: %clangxx -fsycl -I%S/.. %S/Inputs/pm_common.cpp -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out 3
 // Regression in GPU RT 21.16.19610
-// XFAIL: level_zero
+// XFAIL: level_zero && linux