Add support for --overlay and --rsync-{src,dest} to build and osc.
--overlay OVERLAY
Copy overlay filesystem to buildroot after installing
all RPMs. This must be a valid directory.
--rsync-src RSYNCSRC
Copy overlay folder (RSYNCSRC) to a folder (RSYNCDEST)
inside the buildroot using rsync.
It will "%define RSYNCDONE 1" for handling %setup in your
specfile. E.g.:
%prep
%if 0%{?RSYNCDONE}
%setup -n aaa_base -T -D -b 5 -b 7
%else
%setup -n aaa_base -b 5 -b 7
%endif
--rsync-dest RSYNCDEST
Todo: tell rpmbuild not to delete the folders.