Skip exception mangle

[haowenwu]

Fix problem:

Undefined symbols for architecture arm64: "std::Pod_exception::what() const", referenced from: vtable for std::__1::bad_function_call in libDemo.a(Demo.o) "typeinfo for std::Pod_exception", referenced from: typeinfo for std::__1::bad_function_call in libDemo.a(Demo.o) "std::Pod_exception::~Pod_exception()", referenced from: std::__1::bad_function_call::~bad_function_call() in libDemo.a(Demo.o) ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)