[lucid:linux lucid:linux-unstable] rsync not needed on i386

[Andy Whitcroft]

rsync is no longer available on i386.  In lucid we only produce
linux-libc-dev from the kernel package on i386.  We only use rsync when
building tools and when building documentation; we do neither on i386.

Architecture limit our dependency to allow i386 builds to continue to
build.

Proposing for all lucid kernels which have i386; lucid:linux and
lucid:linux-unstable (maybe).

-apw