Print the package name on deletion errors.
Print the package name on deletion errors.

It appears this was already done in NetBSD a decade ago, hence
I just reuse the change (except our code is bad styled).

PR:		bin/160516
Approved by:	portmgr
Approved by:	re (kib)
Obtained from:	NetBSD

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase