Add a mock build that works as root to Rawhide workarounds

mock 3.2 does not allow running as root. This breaks the live
image build tests. It's being reverted upstream, this scratch
build has the reversion backported.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

lib/utils.pm

@@ -481,7 +481,7 @@ sub setup_workaround_repo {
         "35" => [],
         "36" => [],
         "37" => [],
-        "38" => [],
+        "38" => ["93141943"],
     );
     # then we'll download each update for our release:
     my $advortasks = $workarounds{$version};