cmd/link/internal/loong64: correct the glibc dynamic linker path.

cmd/link/internal/loong64: correct the glibc dynamic linker path.

Ref: https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_program_interpreter_path

Change-Id: Ic2598110cc091362cb09f877b6b86433cacf32c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/526535
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Cherry Mui <cherryyz@google.com>