Merge branch 'ghc-7.8' of https://github.com/ghc/ghc into ghc-7.8

Makefile

aclocal.m4

compiler/basicTypes/PatSyn.lhs

compiler/cmm/CLabel.hs

compiler/cmm/PprC.hs

compiler/coreSyn/CoreLint.lhs

compiler/deSugar/DsArrows.lhs

compiler/deSugar/DsCCall.lhs

compiler/deSugar/DsExpr.lhs

compiler/deSugar/DsMeta.hs

compiler/deSugar/MatchLit.lhs

compiler/ghc.mk

compiler/main/DriverPipeline.hs

compiler/main/SysTools.lhs

compiler/main/TidyPgm.lhs

compiler/nativeGen/X86/CodeGen.hs

compiler/rename/RnBinds.lhs

compiler/rename/RnNames.lhs

compiler/specialise/SpecConstr.lhs

compiler/typecheck/TcGenGenerics.lhs