A couple small changes to get LIT working with python3

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@226330 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/lit.cfg b/test/lit.cfg
index 6f53638..c487cf3 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -49,7 +49,7 @@
 
 cfg_variant = getattr(config, 'configuration_variant', 'libcxx')
 if cfg_variant:
-    print 'Using configuration variant: %s' % cfg_variant
+    lit_config.note('Using configuration variant: %s' % cfg_variant)
 
 # Load the Configuration class from the module name <cfg_variant>.test.config.
 config_module_name = '.'.join([cfg_variant, 'test', 'config'])