User controlled stack boundary check in wamrc

[TianlongLiang]

In wamrc compiler, allow the user to control stack boundary check when boundary check is enabled. Now the code logic is:

1. When --stack-bounds-checks is not set, it will be the same value as --bounds-checks.
2. When --stack-bounds-checks is set, it will be the option value no matter what the status of --bounds-checks is