clamav-1.5: Ignore tempdir check

[cjwatson]

melange is soon going to make it an error to ship a directory under /run without a corresponding /usr/lib/tmpfiles.d snippet as part of the project to merge /var/run into /run, but in this case it doesn't actually matter.

Related: https://docs.google.com/document/d/1pydotE6GRdgWP9xmO9YFFX6_f7PdMa7wMWRQSzH8bFw