ARM64: block veneer pool in InstructionAccurateScope.

TEST=mozilla/ecma_3/RegExp/regress-169497
TBR=alexandre.rames@arm.com

Review URL: https://codereview.chromium.org/211323003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20255 ce2b1a6d-e550-0410-aec6-3dcde31c8c00