assertions: Add "silent" option

Reduces assertion codesize overhead by approximately 35%

components/newlib/platform_include/assert.h

@@ -0,0 +1,28 @@
+// Copyright 2017 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.
+
+
+/* This header file wraps newlib's own unmodified assert.h and adds
+   support for silent assertion failure.
+*/
+#pragma once
+#include <sdkconfig.h>
+#include <stdlib.h>
+
+#include_next <assert.h>
+
+#if defined(CONFIG_OPTIMIZATION_ASSERTIONS_SILENT) && !defined(NDEBUG)
+#undef assert
+#define assert(__e) ((__e) ? (void)0 : abort())
+#endif