please give-back openvdb_2.3.0-2 on sparc and mipsel

[Mathieu Malaterre <malat@debian.org>]

Hello,

Please give-back openvdb_2.3.0-2 on sparc and mipsel.

http://packages.qa.debian.org/openvdb

The binaries should *not* be available on those arches, since tbb is
not built on those:

https://buildd.debian.org/status/package.php?p=tbb&suite=unstable

gb openvdb_2.3.0-2 . sparc mipsel

Thank you,

-M