Bug#486436: exim4: include tardy in build-depends

[Russell Stuart]

Package: exim4
Version: 4.69-5
Severity: serious
Justification: no longer builds from source

patches/30_dontoverridecflags runs tardy.  Either put tardy
in build-depends, or re-write 30_dontoverridecflags to get
rid of it.

-- System Information:
Debian Release: 3.1
Architecture: i386 (i686)
Kernel: Linux 2.6.17-8.1-lube-686-smp
Locale: LANG=en_AU, LC_CTYPE=en_AU (charmap=ISO-8859-1)

Versions of packages exim4 depends on:
ii  debconf [debconf-2.0]         1.4.30.13  Debian configuration management sy
ii  exim4-base                    4.69-5.1   support files for all Exim MTA (v4
ii  exim4-daemon-custom           4.69-5.1   custom Exim MTA (v4) daemon with l