Commit 81d2b72 added a package providing libdeflate. Tiff by default
links to it, causing a build error.
Package libtiff is missing dependencies for the following libraries:
libdeflate.so.0
This commit forces libdeflate use off to avoid this. No revision bump is
done because the package is currently not compiling anyway.
Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>