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.
