Adding trial build against GHC HEAD
Adding trial build against GHC HEAD

SAdams601/HaRe,kmate/HaRe,kmate/HaRe,mpickering/HaRe,RefactoringTools/HaRe,kmate/HaRe,RefactoringTools/HaRe,SAdams601/HaRe,mpickering/HaRe,SAdams601/HaRe,RefactoringTools/HaRe,mpickering/HaRe