Bug#818241: brltty: Unstable brltty

[Samuel Thibault]

One thing which is notably different between 5.3.1-1 and 5.3.1-1+b1 is
that 5.3.1-1 depends on libsystemd while 5.3.1-1+b1 does not.  Mario,
had you checked in a pbuilder for the build dependencies?

Samuel