[GHC] Batch modify: #11486, #11383, #10626, #10346, #7307, #1168, #917

Batch modification to #11486, #11383, #10626, #10346, #7307, #1168, #917 by thomie: failure to Runtime performance bug -- Tickets URL: http://ghc.haskell.org/trac/ghc/query?id=11486%2C11383%2C10626%2C10346%2C730... GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler