More fixes for Safe Haskell bounds under GHC 7.10

System/Posix/ByteString/FilePath.hsc

System/Posix/Directory/Common.hsc

System/Posix/DynamicLinker.hsc

System/Posix/DynamicLinker/ByteString.hsc

System/Posix/DynamicLinker/Common.hsc

System/Posix/DynamicLinker/Module/ByteString.hsc

System/Posix/Env/ByteString.hsc

System/Posix/Error.hs

System/Posix/Files.hsc

System/Posix/Files/ByteString.hsc

System/Posix/IO/Common.hsc

System/Posix/Process.hsc

System/Posix/Process/ByteString.hsc

System/Posix/Resource.hsc

System/Posix/Semaphore.hsc

System/Posix/Signals/Exts.hsc

System/Posix/Terminal.hsc

System/Posix/Terminal/ByteString.hsc

System/Posix/Time.hsc

System/Posix/Unistd.hsc