Bug#1110821: binutils now has a libsframe-dev package, please add an explicit build dependency

[Matthias Klose]

Package: src:austin
Version: 3.7.0-4
Severity: important
Tags: sid forky
binutils now has a libsframe-dev package, please add an explicit build 
dependency, so that the dependency from binutils-dev on libsframe-dev 
can be dropped.