This CL changes the sorting algorithm used in Array.p.sort from
QuickSort to TimSort (implemented in Torque).

Detailed performance results can be found here: https://goo.gl/4E733J

To save on code space, fast-paths are implemented as sets of
function pointers instead of specializing generics.

R=cbruni@chromium.org, jgruber@chromium.org

Bug: v8:7382, v8:7624
Change-Id: I7cd4287e4562d84ab7c79c58ae30780630f976de
Reviewed-on: https://chromium-review.googlesource.com/1151199
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55003}