It is preferable to avoid arch specific lines in lintian override files.  Lintian does support wildcards matching (see section 2.4.1).  While this wasn't fully supported in lintian 2.4.3 (in squeeze), 2.5.10 is in squeeze-backports, so I see no problem with using this feature.

So you should be able to match on usr/lib/epics/lib/linux-*-debug/lib*.so.*

http://lintian.debian.org/manual/section-2.4.html