Fix Changes section on build page. Now shows the changes of the first evaluation a build was part of compared to the previous one. Also separated previous builds from the changes section, as that was confusing sometimes.

src/lib/Hydra/Controller/Build.pm

@@ -107,6 +107,11 @@ sub build_GET {
         entity => $build
     );
 
+    my ($eval2) = $c->stash->{eval}->jobset->jobsetevals->search(
+       { hasnewbuilds => 1, id => { '<', $c->stash->{eval}->id } },
+       { order_by => "id DESC", rows => 1 });
+    $c->stash->{otherEval} = $eval2 if defined $eval2;
+
     # If this is an aggregate build, get its constituents.
     $c->stash->{constituents} = [$c->stash->{build}->constituents_->search({}, {order_by => ["job"]})];
 }