Apply clang-format for more src files and update spec test script (#775)

Apply clang-format for core/iwasm/include, core/iwasm/common and
core/iwasm/aot files.

Update spec cases test script:
- Checkout latest commit of https://github.com/WebAssembly/spec
- Checkout main branch but not master of https://github.com/WebAssembly/threads
- Update wabt to latest version

And update source debugging document.

Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>

core/iwasm/common/wasm_memory.h

@@ -25,4 +25,3 @@ wasm_runtime_memory_destroy();
 #endif
 
 #endif /* end of _WASM_MEMORY_H */
-