[GHC] #9224: Add support for binary integer literals

[GHC]

#9224: Add support for binary integer literals
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        Reporter:  hvr               |            Owner:
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:  7.10.1
       Component:  Compiler          |          Version:
  (Parser)                           |         Keywords:  literals
      Resolution:                    |     Architecture:  Unknown/Multiple
Operating System:  Unknown/Multiple  |       Difficulty:  Easy (less than 1
 Type of failure:  None/Unknown      |  hour)
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by hvr):

 Initial patch (sans the language-extension) pushed to
 https://phabricator.haskell.org/D22 for review

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9224#comment:1>
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