Add back in missing chars from Openwall test vectors

These were deleted in #182, but are a part of the Openwall test vectors.  They’re important because they’re actually making the string longer than 72 characters, which is the test that the vector is going for.

spec/bcrypt/engine_spec.rb

@@ -72,7 +72,7 @@ class MyInvalidSecret
       ["U*U", "$2a$05$CCCCCCCCCCCCCCCCCCCCC.", "$2a$05$CCCCCCCCCCCCCCCCCCCCC.E5YPO9kmyuRGyh0XouQYb4YMJKvyOeW"],
       ["U*U*", "$2a$05$CCCCCCCCCCCCCCCCCCCCC.", "$2a$05$CCCCCCCCCCCCCCCCCCCCC.VGOzA784oUp/Z0DY336zx7pLYAy0lwK"],
       ["U*U*U", "$2a$05$XXXXXXXXXXXXXXXXXXXXXO", "$2a$05$XXXXXXXXXXXXXXXXXXXXXOAcXxm9kjPGEMsLznoKqmqw7tc8WCx4a"],
-      ["0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", "$2a$05$abcdefghijklmnopqrstuu", "$2a$05$abcdefghijklmnopqrstuu5s2v8.iXieOjg/.AySBTTZIIVFJeBui"],
+      ["0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789chars after 72 are ignored", "$2a$05$abcdefghijklmnopqrstuu", "$2a$05$abcdefghijklmnopqrstuu5s2v8.iXieOjg/.AySBTTZIIVFJeBui"],
       ["\xa3", "$2x$05$/OK.fbVrR/bpIqNJ5ianF.", "$2x$05$/OK.fbVrR/bpIqNJ5ianF.CE5elHaaO4EbggVDjb8P19RukzXSM3e"],
       ["\xff\xff\xa3", "$2x$05$/OK.fbVrR/bpIqNJ5ianF.", "$2x$05$/OK.fbVrR/bpIqNJ5ianF.CE5elHaaO4EbggVDjb8P19RukzXSM3e"],
       ["\xff\xff\xa3", "$2y$05$/OK.fbVrR/bpIqNJ5ianF.", "$2y$05$/OK.fbVrR/bpIqNJ5ianF.CE5elHaaO4EbggVDjb8P19RukzXSM3e"],