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

samples/linux-perf/cmake/FindWAMRC.cmake

@@ -0,0 +1,14 @@
+# Copyright (C) 2019 Intel Corporation. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+include(FindPackageHandleStandardArgs)
+
+find_file(WAMRC_BIN
+  NAMES wamrc
+  DOC "search wamrc"
+  HINTS ${CMAKE_CURRENT_SOURCE_DIR}/../../../wamr-compiler/build
+  REQUIRED
+)
+
+find_package_handle_standard_args(WAMRC REQUIRED_VARS WAMRC_BIN)
+mark_as_advanced(WAMRC_BIN)