Added per-file stats to -Dscala.timings.
Added per-file stats to -Dscala.timings.

  % pscalac -Dscala.timings ./src/library/scala/util/*.scala
                    phase  id    ms  share
  -----------------------  --  ----  -----
                    typer  4   3632  44.73
               specialize  13  1175  14.47
                  erasure  15   800  9.85
                      jvm  27   504  6.21
                    icode  22   427  5.26
                    ...
        ms  path
  --------  ----------------------------------------------
  1056.667  ./src/library/scala/util/Sorting.scala
  1019.369  ./src/library/scala/util/MurmurHash.scala
   702.881  ./src/library/scala/util/Properties.scala
   435.053  ./src/library/scala/util/Random.scala
   429.702  ./src/library/scala/util/MurmurHash3.scala
   246.453  ./src/library/scala/util/DynamicVariable.scala
    69.755  ./src/library/scala/util/Marshal.scala

shimib/scala,scala/scala,martijnhoekstra/scala,shimib/scala,felixmulder/scala,jvican/scala,felixmulder/scala,shimib/scala,jvican/scala,jvican/scala,slothspot/scala,lrytz/scala,felixmulder/scala,slothspot/scala,slothspot/scala,scala/scala,shimib/scala,lrytz/scala,jvican/scala,shimib/scala,slothspot/scala,slothspot/scala,martijnhoekstra/scala,lrytz/scala,slothspot/scala,shimib/scala,scala/scala,felixmulder/scala,martijnhoekstra/scala,martijnhoekstra/scala,scala/scala,jvican/scala,martijnhoekstra/scala,felixmulder/scala,slothspot/scala,jvican/scala,felixmulder/scala,lrytz/scala,jvican/scala,scala/scala,lrytz/scala,lrytz/scala,scala/scala,felixmulder/scala,martijnhoekstra/scala