[GHC] #13357: Check demand signatures for catchRetry# and catchSTM#

[GHC]

#13357: Check demand signatures for catchRetry# and catchSTM#
-------------------------------------+-------------------------------------
           Reporter:  dfeuer         |             Owner:  (none)
               Type:  task           |            Status:  new
           Priority:  normal         |         Milestone:  8.2.1
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 #13330 was fixed by giving `catch#` a different (simpler and more honest)
 demand signature. Are the signatures for `catchRetry#` and `catchSTM#`
 similarly problematic? We need to check.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13357>
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