Arm64: Fix check errors on Arm64 debug after r21177.

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

Committed: https://code.google.com/p/v8/source/detail?r=21179

[rmcilroy, 2014-05-06 19:05:14]

TBRing this to hopefully green up the tree - please let me know if you would
like any changes and I will do them as a seperate CL.

[rmcilroy, 2014-05-06 19:07:53]

Committed patchset #1 manually as r21179 (tree was closed).