Add processing of '-help' option.

llvm-svn: 145516
diff --git a/lldb/test/redo.py b/lldb/test/redo.py
index a57ca68..c2ed5d3 100755
--- a/lldb/test/redo.py
+++ b/lldb/test/redo.py
@@ -102,6 +102,9 @@
 
     index = 1
     while index < len(sys.argv):
+        if sys.argv[index].startswith('-h'):
+            usage()
+
         if sys.argv[index].startswith('-'):
             # We should continue processing...
             pass