Take '--help' as well as '-h' as hint to emit the usage output.

llvm-svn: 162502
diff --git a/lldb/test/redo.py b/lldb/test/redo.py
index eee1130..acb5aa4 100755
--- a/lldb/test/redo.py
+++ b/lldb/test/redo.py
@@ -121,7 +121,7 @@
 
     index = 1
     while index < len(sys.argv):
-        if sys.argv[index].startswith('-h'):
+        if sys.argv[index].startswith('-h') or sys.argv[index].startswith('--help'):
             usage()
 
         if sys.argv[index].startswith('-'):