Arm64: Fix check errors on Arm64 debug after r21177.

r21177 added extra AssertStackConsistency() checks which
increased code size on debug and caused the assembler buffer
to be too large.  Increased some of these buffers to
compensate.

Also, ProfileEntryHoolStub could use the wrong number of
instructions for kProfileEntryHookCallSize depending upon
whether debug code was being emitted or ALWAYS_ALIGN_CSP was
enabled.  Fixed this by taking ALWAYS_ALIGN_CSP into account
and ensuring that no debug code is emitted during
MaybeCallEntryHook().

TBR=ulan@chromium.org

Review URL: https://codereview.chromium.org/263213008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21179 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Fix for 3303 MultithreadedParallelIsolates has a race condition.

Port r21165 (50673b25)

Original commit message:
The fix is to make the code aging sequence hang off the isolate.

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/264823004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21180 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'