cmd/link: add DT_NEEDED for all 64-bit ELF dynimplib
Also change the relevant test to be tested on the linux-arm64 platform
as well.
Fixes #49789
Change-Id: Id2eac7a45279f037957442862f8ed63838b8e929
Reviewed-on: https://go-review.googlesource.com/c/go/+/366855
Trust: Ian Lance Taylor <iant@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>