specify some options for buildout by default.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@37872 20353a03-c40f-0410-a6d1-a30d3c3de9de

buildout/Makefile

 PYTHON=python
+BUILDOUT_OPT=-U -v
 SOFTWARE_BUILD_PATH='/opt/erp5/'`cat VERSION.txt`
 PACKAGE_INSTALL_PATH='opt/erp5/'`cat VERSION.txt`
 ifndef $(PACKAGE_VERSION)
@@ -12,7 +13,7 @@ PACKAGE_APPLICATION_RELEASE=001
 endif
 
 software: bin/buildout
-	bin/buildout
+	bin/buildout $(BUILDOUT_OPT)
 
 bin/buildout:
 	$(PYTHON) -S bootstrap/bootstrap.py