cmd/dist,internal: enable buildmode=c-archive for linux/loong64
Now the shared flag is supported on the linux/loong64 platform and
misc/cgo/testcarchive has been passed, buildmode=c-archive can be used.
Change-Id: Ice450dc11fcb91942fdf2ddd34bb163853267e01
Reviewed-on: https://go-review.googlesource.com/c/go/+/489576 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Meidan Li <limeidan@loongson.cn>
Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Run-TryBot: WANG Xuerui <git@xen0n.name>