Esimd emulator preparation (intel#744)

- This PR is for clearing failures observed while merging intel/llvm
PR enabling esimd_emulator support by default
(intel#5058)

- Another PR should be created for actively loading and testing
'esimd_emulator' backend

Author: dongkyunahn-intel

SYCL/lit.cfg.py

@@ -273,11 +273,11 @@
 if 'cpu' in config.target_devices.split(','):
     found_at_least_one_device = True
     lit_config.note("Test CPU device")
-    cpu_run_substitute = "env SYCL_DEVICE_FILTER=cpu,host "
+    cpu_run_substitute = "env SYCL_DEVICE_FILTER={SYCL_PLUGIN}:cpu,host ".format(SYCL_PLUGIN=config.sycl_be)
     cpu_check_substitute = "| FileCheck %s"
     config.available_features.add('cpu')
     if platform.system() == "Linux":
-        cpu_run_on_linux_substitute = "env SYCL_DEVICE_FILTER=cpu,host "
+        cpu_run_on_linux_substitute = cpu_run_substitute
         cpu_check_on_linux_substitute = "| FileCheck %s"
 else:
     lit_config.warning("CPU device not used")