- Adds opcodes for 2x8, 4x4, and 8x2 byte reversing swizzles on ia32.

Bug: v8:6020
Change-Id: I2c5d4ba88b42a17fc75ac0307e80d8c11d1838ba
Reviewed-on: https://chromium-review.googlesource.com/1121956
Commit-Queue: Bill Budge <bbudge@chromium.org>
Reviewed-by: Jing Bao <jing.bao@intel.com>
Cr-Commit-Position: refs/heads/master@{#54302}