graw: update graw_null after interface changes and build graw tests again
diff --git a/SConstruct b/SConstruct
index 76ada41..83c29c0 100644
--- a/SConstruct
+++ b/SConstruct
@@ -31,7 +31,7 @@
 # Configuration options
 
 default_statetrackers = 'mesa'
-default_targets = 'none'
+default_targets = 'graw-null'
 
 if common.default_platform in ('linux', 'freebsd', 'darwin'):
 	default_drivers = 'softpipe,failover,svga,i915,i965,trace,identity,llvmpipe'
@@ -69,6 +69,7 @@
 		       'egl-swrast',
 		       'egl-vmwgfx',
 		       'graw-xlib',
+		       'graw-null',
 		       'libgl-gdi',
 		       'libgl-xlib',
 		       'xorg-i915',