runtime: mark morestack_noctxt SPWRITE for linux/loong64
ref. CL 425396
Updates #54332.
Change-Id: I1a235b0cca4dbf79cf61cf5f40b594fc2d940857
Reviewed-on: https://go-review.googlesource.com/c/go/+/446895 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: WANG Xuerui <git@xen0n.name>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: xiaodong liu <teaofmoli@gmail.com>