move rb_vm_lvar_exposed() correctly.
rb_vm_lvar_exposed() is prepared for __builtin_inline!(), needed for mini_builtin.c and builtin.c. However, it's only on builtin.c. So move it to make it as a part of VM.
move rb_vm_lvar_exposed() correctly.
rb_vm_lvar_exposed() is prepared for __builtin_inline!(), needed for
mini_builtin.c and builtin.c. However, it's only on builtin.c.
So move it to make it as a part of VM.