Enhance wasm loading with LoadArgs and support module names (#3265)

- Add new API wasm_runtime_load_ex() in wasm_export.h
  and wasm_module_new_ex in wasm_c_api.h
- Put aot_create_perf_map() into a separated file aot_perf_map.c
- In perf.map, function names include user specified module name
- Enhance the script to help flamegraph generations

core/iwasm/aot/aot_perf_map.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2019 Intel Corporation. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#ifndef _AOT_PERF_MAP_H_
+#define _AOT_PERF_MAP_H_
+
+#include "aot_runtime.h"
+
+bool
+aot_create_perf_map(const AOTModule *module, char *error_buf,
+                    uint32 error_buf_size);
+
+#endif /* _AOT_PERF_MAP_H_ */