Fix for (One|Two)ByteSeqStringSetChar evaluation order/deopt.

This makes the evaluation order consistent between full codegen
and Hydrogen (so that deopt does not screw up stack).

R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/159983008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19326 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Add to OWNERS for arm and a64

R=danno@chromium.org

Review URL: https://codereview.chromium.org/138953017

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19327 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Avoid doing explicit cast in simulator-a64::get_sp().

R=rodolph.perfetta@arm.com

Review URL: https://codereview.chromium.org/153823012

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19328 ce2b1a6d-e550-0410-aec6-3dcde31c8c00