[GHC] #11743: Add unicode support for TH quotes (`[| |]`)

[GHC]

#11743: Add unicode support for TH quotes (`[| |]`)
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        Reporter:  JoshPrice247      |                Owner:  JoshPrice247
            Type:  feature request   |               Status:  new
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
  (Parser)                           |             Keywords:  unicode,
      Resolution:                    |  UnicodeSyntax
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  2878, 10162       |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by JoshPrice247):

 I would like suggestions on how to proceed with this. I have it
 implemented, but it depends on changes made in Phab:D2012. Do I need to
 wait until D2012 lands and then create a new differential?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11743#comment:2>
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