add final newline

Author: arthw

ggml/src/ggml-sycl/sycl_device.cpp

@@ -338,4 +338,4 @@ int ggml_sycl_device_info::hw_family(int id) {
 static inline bool env_existed(const char *env_name) {
      char *user_device_string = getenv(env_name);
      return user_device_string!=NULL;
-}
+}