cmd/dist: enable cgo for freebsd/arm
cmd/dist: enable cgo for freebsd/arm

Change-Id: Icc1a54da848bf446919c0d5470d1e79fad339832
Reviewed-on: https://go-review.googlesource.com/c/go/+/171727
Reviewed-by: Tobias Klauser <0a68dd4915066ec5d3f81f75a828fee53dcc8822@gmail.com>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

nawawi/go,nawawi/go,golang/go,nawawi/go,CAFxX/go,cloudflare/go,cloudflare/go,golang/go,nawawi/go,josharian/go,nawawi/go,golang/go,akutz/go,cloudflare/go,josharian/go,CAFxX/go,akutz/go,cloudflare/go,josharian/go,CAFxX/go,CAFxX/go,golang/go,CAFxX/go,golang/go,cloudflare/go,akutz/go,josharian/go,CAFxX/go,nawawi/go,golang/go,josharian/go,cloudflare/go,cloudflare/go,CAFxX/go,CAFxX/go,josharian/go,akutz/go,nawawi/go,cloudflare/go,golang/go,nawawi/go,akutz/go,josharian/go,akutz/go,golang/go,akutz/go,akutz/go,josharian/go