feat(util): Use independent "util_assert" instead of "assert"

components/util/include/util_assert.h

@@ -0,0 +1,24 @@
+// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include "sdkconfig.h"
+#include "assert.h"
+
+#ifdef CONFIG_UTIL_ASSERT
+#define util_assert(_e)     assert(_e)
+#else
+#define util_assert(_e)
+#endif