Fixed processing of architectures in repomaker

Fixed processing of architectures in repomaker

Repomaker was getting list of architectures analyzinng packages in the
incoming repository. If repository doesn't contain some architectures
those were skipped. This was a mistake. Now repomaker gets list of
architectures as a parameter and creates output repos for all
architectures even if no packages found in incoming repo for some of
them.

Fixes: #1324

Change-Id: I2e4fa4df61ae1fcaa64d0792648391493c962001
Signed-off-by: Ed Bartosh <eduard.bartosh@intel.com>