cmd/link/internal/loong64: correct the musl dynamic linker path
The arch name of loong64 should be loongarch64
Fixes #67832
Change-Id: Ic5cf0f0274262a164bba78c426813a8b8851033b
Reviewed-on: https://go-review.googlesource.com/c/go/+/590695 Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: abner chenc <chenguoqi@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
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