Make requirements stricter (required packages instead of recommended
packages) and remove requirements that are no longer needed. The
previous requirements caused failures in manual testing and possibly
some gating failures as well.
Since 10.56, annocheck needs to be told how to handle symlinks. This
particular test was developed for the "follow symlinks" behaviour so
let's add --follow-links. However, while being here, checking on the
other code path wouldn't hurt so let's look at it, too.
Related: https://pagure.io/fedora-ci/general/issue/206
Also, drop unneeded legacy Makefile's and PURPOSE files,
and explicitly require gcc.rpm, which is not installed
on the CI workers by default any more it seems.
