WASM_X86: Support exit

Author: ubaidsk

src/libasr/codegen/wasm_to_x86.cpp

@@ -25,6 +25,8 @@ class X86Visitor : public WASMDecoder<X86Visitor>,
         wasm_bytes.from_pointer_n(code.data(), code.size());
     }
 
+    void visit_Unreachable() {}
+
     void visit_Return() {}
 
     void visit_Call(uint32_t func_index) {
@@ -137,7 +139,7 @@ class X86Visitor : public WASMDecoder<X86Visitor>,
 
         // Add runtime library functions
         emit_print_int(m_a, "print_i32");
-        emit_exit(m_a, "exit", 0);
+        emit_exit2(m_a, "exit");
 
         for (uint32_t i = 0; i < type_indices.size(); i++) {
             if (i < type_indices.size() - 1U) {