cmd/dist: report correct CC name in error about missing CC
cmd/dist: report correct CC name in error about missing CC

Fixes #25611

Change-Id: I487463584e4d9d99cf5d8db0c9a4b4e66464ecd8
Reviewed-on: https://go-review.googlesource.com/114935
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

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