vlc-debian-android: disable Readline warning
``` #5 13.90 debconf: unable to initialize frontend: Dialog #5 13.90 debconf: (TERM is not set, so the dialog frontend is not usable.) #5 13.90 debconf: falling back to frontend: Readline #5 13.90 debconf: unable to initialize frontend: Readline #5 13.90 debconf: (Can't locate Term/ReadLine.pm in @INC (you may need to install the Term::ReadLine module) (@INC entries checked: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.40.1 /usr/local/share/perl/5.40.1 /usr/lib/x86_64-linux-gnu/perl5/5.40 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl-base /usr/lib/x86_64-linux-gnu/perl/5.40 /usr/share/perl/5.40 /usr/local/lib/site_perl) at /usr/share/perl5/Debconf/FrontEnd/Readline.pm line 8.)