SafeHaskell: Added SafeHaskell to base

libraries/base/Control/Applicative.hs

libraries/base/Control/Arrow.hs

libraries/base/Control/Category.hs

libraries/base/Control/Concurrent.hs

libraries/base/Control/Concurrent/Chan.hs

libraries/base/Control/Concurrent/MVar.hs

libraries/base/Control/Concurrent/QSem.hs

libraries/base/Control/Concurrent/QSemN.hs

libraries/base/Control/Concurrent/SampleVar.hs

libraries/base/Control/Exception.hs

libraries/base/Control/Exception/Base.hs

libraries/base/Control/Monad.hs

libraries/base/Control/Monad/Fix.hs

libraries/base/Control/Monad/Group.hs

libraries/base/Control/Monad/Instances.hs

libraries/base/Control/Monad/ST.hs

libraries/base/Control/Monad/ST/Imp.hs

libraries/base/Control/Monad/ST/Lazy.hs

libraries/base/Control/Monad/ST/Lazy/Imp.hs

libraries/base/Control/Monad/ST/Lazy/Safe.hs