scons: Build the trace pipe driver by default.
diff --git a/SConstruct b/SConstruct
index ee96bc5..cd5b228 100644
--- a/SConstruct
+++ b/SConstruct
@@ -32,10 +32,10 @@
 default_statetrackers = 'mesa'
 
 if common.default_platform in ('linux', 'freebsd', 'darwin'):
-	default_drivers = 'softpipe,failover,i915simple,i965simple'
+	default_drivers = 'softpipe,failover,i915simple,i965simple,trace'
 	default_winsys = 'xlib'
 elif common.default_platform in ('winddk',):
-	default_drivers = 'softpipe,i915simple'
+	default_drivers = 'softpipe,i915simple,trace'
 	default_winsys = 'all'
 else:
 	default_drivers = 'all'