Implement part of codegen and fix some frontend issues
Add asmjit to emit native code and add zydis to disassemble native code
Can successfully run some simple cases
Since `basic_block_else` is NULL, it meets a crash if there is a
IF block without a else branch. Like:
``` wat
(func (export "params-id") (param i32) (result i32)
(i32.const 1)
(if (param i32) (result i32) (local.get 0)
(then)
)
)
```
Consider the ELSE block will be created lazily, focus on
`basic_block_entry" here.
After `jit_value_stack_destory()`, the `JitValue` pointed
by `value_list_head` and `value_list_end` are freed and
still keep the value.
So, when `jit_value_stack_push()` is called, for example,
`load_block_params()` after `jit_value_stack_destroy()` in
`handle_op_else()`, `value_stack` will not be treated like
an empty one, and new `JitValue` will be appended to `value_list_end`,
which is a dangling pointer(pointer to the freed `JitValue`).
Add more return value checks and set lass error
Implement exception throw and add operand stack overflow check
Remove lower_fe pass
Use cc->cmp_reg for cmp/branch IRs
Fix jit dump issues
Fix some compile warnings
Add part of codegen framework
Remove some unused JIT IRs
