When rethrowing an exception, print the stack trace of its original site instead of rethrow site (Chromium issue 60240).

Increased size of small stacks from 32k to 64k to avoid hitting limits in Chromium (Chromium issue 112843).

git-svn-id: http://v8.googlecode.com/svn/trunk@10621 ce2b1a6d-e550-0410-aec6-3dcde31c8c00