Small simplification of header path for file flag.

(This code section likely to be replaced later, though.)

refresh.template.py

@@ -871,10 +871,10 @@ def _get_commands(target: str, flags: str):
         if file_path.endswith(_get_files.source_extensions):
             target_statment = f"inputs('{re.escape(file_path)}', {target_statment})"
         else:
-            # For header file we try to find from hdrs and srcs to get the targets
+            # For header files we try to find from hdrs and srcs to get the targets
             # Since attr function can't query with full path, get the file name to query
-            head, tail = os.path.split(file_path)
-            target_statment = f"let v = {target_statment} in attr(hdrs, '{tail}', $v) + attr(srcs, '{tail}', $v)"
+            fname = os.path.basename(file_path)
+            target_statment = f"let v = {target_statment} in attr(hdrs, '{fname}', $v) + attr(srcs, '{fname}', $v)"
     aquery_args = [
         'bazel',
         'aquery',