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

test/libcxx/test/format.py

@@ -25,7 +25,7 @@ class LibcxxTestFormat(lit.formats.FileBasedTest):
         while True:
             try:
                 return self._execute(test, lit_config)
-            except OSError, oe:
+            except OSError as oe:
                 if oe.errno != errno.ETXTBSY:
                     raise
                 time.sleep(0.1)

test/lit.cfg

@@ -49,7 +49,7 @@ if config.test_exec_root is None:
 
 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'])