regenerate l2 asm file on amd64
-// Code generated by command: go run l2.go -out l2.s -stubs l2_stub.go. DO NOT EDIT.
+// Code generated by command: go run l2.go -out l2_amd64.s -stubs l2_stub_amd64.go. DO NOT EDIT.
#include "textflag.h"
