[Tts-project] Bug#1076147: d/t/tests: Use trap to reverse the patch

[Nathan Pratta Teodosio]

Package: speech-dispatcher
Version: 0.12.0~rc2-2build3
Severity: wishlist
Tags: patch
X-Debbugs-Cc: nathan.teodosio at canonical.com

Dear Maintainer,

When executing a failing autopkgtest locally it will fail on applying the patch
as the previous failure caused it not to be reversed.

I hereby suggest to use a trap to always reverse the patch after a test is
carried out, regardless of whether successfully or not.

Cheers,
Nathan Teodosio