[SYCL][NATIVECPU] Check NativeCPU libclc for Windows (#14632)

Addresses #14500 to check that the
NativeCPU libclc was built on Windows.

Author: uwedolinsky

sycl/test/check_device_code/native_cpu/sycl-native-cpu-libclc-linux.cpp

@@ -0,0 +1,5 @@
+// TODO: move this to clang/Driver once Native CPU is enabled in CI
+// REQUIRES: native_cpu && linux
+// RUN: %clang -### -fsycl -fsycl-targets=native_cpu -target x86_64-unknown-linux-gnu %s 2> %t.ncpu.out
+// RUN: FileCheck %s --input-file %t.ncpu.out
+// CHECK: {{(\\|/)}}remangled-l64-signed_char.libspirv-x86_64-unknown-linux-gnu.bc"

sycl/test/check_device_code/native_cpu/sycl-native-cpu-libclc.cpp renamed to sycl/test/check_device_code/native_cpu/sycl-native-cpu-libclc-windows.cpp

@@ -1,11 +1,5 @@
 // TODO: move this to clang/Driver once Native CPU is enabled in CI
-// REQUIRES: native_cpu
-// TODO: currently disabled on Windows, but could work on Windows if Linux
-// libraries are found
-// UNSUPPORTED: (windows)
-// RUN: %clang -### -fsycl -fsycl-targets=native_cpu -target x86_64-unknown-linux-gnu %s 2> %t.ncpu.out
-// RUN: FileCheck %s --input-file %t.ncpu.out
-// CHECK: {{(\\|/)}}remangled-l64-signed_char.libspirv-x86_64-unknown-linux-gnu.bc"
+// REQUIRES: native_cpu && windows
 
 // Check that l32 variant is selected for Windows
 // RUN: %clang -### -fsycl -fsycl-targets=native_cpu -target x86_64-windows %s 2> %t-win.ncpu.out