[SYCLomatic][NFC] Skip dpct/nvshmem.cu if nvshmem header files are not found (#2798)

Signed-off-by: chenwei.sun <chenwei.sun@intel.com>

Author: tomflinda

clang/test/dpct/lit.local.cfg

@@ -124,7 +124,7 @@ else:
 
 # Run the dpct sanity test.
 if not config.unsupported:
-    skipped_cases = ["cudnn_sanity.cu", "nccl_sanity.cu"]
+    skipped_cases = ["cudnn_sanity.cu", "nccl_sanity.cu", "nvshmem.cu"]
     complete_process = run_sanity("cudnn_sanity.cu")
     err_message = ""
     if complete_process.returncode != 0:
@@ -140,6 +140,14 @@ if not config.unsupported:
                           "Please make sure install the header file of NCCL and " + \
                           "export nccl.h in CPATH.\n"
             skipped_cases.extend(get_skipped_cases_with_string("<nccl.h>"))
+    complete_process = run_sanity("nvshmem.cu")
+    if complete_process.returncode != 0:
+        if "'nvshmem.h' file not found" in complete_process.stdout:
+            err_message += "'nvshmem.h' header file not found in platform. " + \
+                          "Please make sure install the header file of nvshmem and " + \
+                          "export nvshmem.h in CPATH.\n"
+            skipped_cases.extend(get_skipped_cases_with_string("<nccl.h>"))
+
     if (err_message):
         sys.stderr.write(err_message)
-    config.excludes =  skipped_cases
+    config.excludes =  skipped_cases