Replace old-time with time in repa-io

[dancewithheart]

This replace deprecated old-time with time.

Test

Build succeed:

cabal build all

Small smoke test that execute modified getTime indirectly using exported time function:

repa/repa-io/Data/Array/Repa/IO/Timing.hs

Lines 86 to 90 in aedc349

	time p = do
	start <- getTime
	x <- p
	end <- getTime
	return (x, end `minus` start)

like so:

import Control.Concurrent (threadDelay)
import Data.Array.Repa.IO.Timing

main :: IO ()
main = do
  (_, elapsed) <- time (threadDelay 10000)
  putStrLn (prettyTime elapsed)

executed:

cabal exec -- runghc repa-io-timing-smoke.hs

gives output:

elapsedTimeMS   = 10
cpuTimeMS       = 0