Show build products on aggregates with channels.

This is to get a bit more consistency among channel builds but doesn't
do a radical change on the display. Ideally we may want to have a
channel overview with all the constituents and a small help showing how
the user can add the channel.

Unfortunately, this also introduces an inconsistency: We previously used
the *subtype* "channel", but now we're expecting "channel" as the type
of the product, so we need to change this for the channels overview as
well.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

src/lib/Hydra/Controller/Build.pm

@@ -108,6 +108,10 @@ sub build_GET {
 
     # If this is an aggregate build, get its constituents.
     $c->stash->{constituents} = [$c->stash->{build}->constituents_->search({}, {order_by => ["job"]})];
+
+    $c->stash->{isChannel} = $c->stash->{build}->buildproducts->search(
+        {type => "channel"}
+    )->count > 0;
 }