apparmor-libreoffice: emit stderr from unoconv

Tests that suppress debug output are user-hostile, and we should
stop doing that.

Reviewed-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D3636

apparmor/libreoffice/libreoffice

@@ -9,6 +9,7 @@ else
 fi
 
 export APERTIS_TESTS_NAME_PREFIX="${1}_"
+export DEBUG=2
 
 if [[ $1 == "malicious" ]]; then
     LD_PRELOAD="/usr/lib/apertis-tests/apparmor/libreoffice/libreoffice-malicious-override.so" \