changes to support scons from peasoup-umbrella dir

SConscript

@@ -183,6 +183,8 @@ if 'PEDI_HOME' in os.environ:
 			action = "if [ -f manifest.txt.config ]; then "+os.environ['PEDI_HOME']+"/pedi -m manifest.txt ; else echo Skipping PEDI; fi" )
 	Depends(pedi,installers)
 	Default( pedi )
+	Return('pedi')
+