Add processing of '-help' option.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@145516 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/redo.py b/test/redo.py
index a57ca68..c2ed5d3 100755
--- a/test/redo.py
+++ b/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