Revert variable switch for lasttag
<span class="gl-align-middle -gl-mr-2 has-tooltip" title="The source project is a fork"><svg class="s12 gl-ml-1 has-tooltip" data-testid="fork-icon"><use href="/assets/icons-41229992eca580608aadaaa9b83b717650b2863442574d0ebb87f859c42a3b6c.svg#fork"></use></svg></span> jmflinuxtx/kernel-ark:broken_changelog into os-build
MR 1757 cleaned up a lot of Makefile variables. In this case though, it has us searching for a full tag with a release, after it has been bumped. As this will never match, the script assumes that this is the first release and appends the entire history to the changelog every time. This change reverts that specific change, and cleans up several thousand lines of changelog mess that it caused.
Signed-off-by: Justin M. Forbes jforbes@fedoraproject.org