[LayoutNG] Reorder members of NGConstraintSpace to reduce size

This patch reorders members of NGConstraintSpace so that
value (non-class/struct) members are placed at the end.

Due to byte-align, it reduces the size from 96 bytes to
88 bytes on x64.

Bug: 635619
Change-Id: I7d9471343f3c16d91f7534fd98e2b95f1d18f8c5
Reviewed-on: https://chromium-review.googlesource.com/c/1314070
Reviewed-by: Christian Biesinger <cbiesinger@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604994}
2 files changed