cmd/dist: disable cgo when testing internal linking of PIE

cmd/dist: disable cgo when testing internal linking of PIE

Since when internal linking cgo on some platforms, like android, is not
fully supported.

Updates #46731

Change-Id: I344a763f8dfb0cce04371d9305eee634bfd9ee77
Reviewed-on: https://go-review.googlesource.com/c/go/+/426199
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>