libgo: zstdpkglist.go depends on libgo-packages.txt

Change-Id: I8eebc8794f772ea07981169107a85f1fefbc6243
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/287812
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2 files changed