Bug#876637: ettercap: build dependency libluajit-5.1-dev is not available on mips64el and ppc64

[Adrian Bunk]

Source: ettercap
Version: 1:0.8.2-8
Severity: serious

The build dependency libluajit-5.1-dev is not available
on mips64el and ppc64, these architectures should be
re-added at the build dependency.