Bug#896654: [git-buildpackage/master] import-orig: Better error message when vcs-tag is not found

[Guido Günther]

tag 896654 pending
thanks

Date:   Mon Apr 23 11:15:16 2018 +0200
Author: Guido Günther <a...@sigxcpu.org>
Commit ID: 3da92ba2c33074f814309d89fec14d18b6bff269
Commit URL: 
https://git.sigxcpu.org/cgit/git-buildpackage//commit/?id=3da92ba2c33074f814309d89fec14d18b6bff269
Patch URL: 
https://git.sigxcpu.org/cgit/git-buildpackage//patch/?id=3da92ba2c33074f814309d89fec14d18b6bff269

    import-orig: Better error message when vcs-tag is not found

    Closes: #896654