[commit: ghc] master's head updated: Add support for pattern synonym type signatures. Syntax is of the form (cce6318)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

Branch 'master' now includes:

     3b81309 Update shift/reduce conflict number in parser
     cce6318 Add support for pattern synonym type signatures. Syntax is of the form