Z:Trace: also turn on Otter debug for App and AppLauncher.

lib/Zircon/Trace.pm

@@ -39,6 +39,7 @@ sub trace_env_update {
         Bio::Otter::Debug->debug('Zircon')) {
         $ENV{$_}=1 foreach
           (qw( ZIRCON_ZMAP_TRACE
+               ZIRCON_APP_TRACE        ZIRCON_APPLAUNCHER_TRACE
                ZIRCON_CONNECTION_TRACE ZIRCON_PROTOCOL_TRACE
                ZIRCON_CONTEXT_TRACE    ZIRCON_SELECTION_TRACE ));
         # we don't admit being able to turn it off again,