glsl: Add a purify command-line tool.
diff --git a/src/SConscript b/src/SConscript
index 1ece895..28105f7 100644
--- a/src/SConscript
+++ b/src/SConscript
@@ -2,6 +2,7 @@
 
 SConscript('gallium/SConscript')
 SConscript('glsl/pp/SConscript')
+SConscript('glsl/apps/SConscript')
 
 if 'mesa' in env['statetrackers']:
 	SConscript('mesa/SConscript')