Correctly reset lastIndex in an RegExp object. (Chromium issue 170856)

Added a workaround for Windows compilation problems related to V8EXPORT. (issue 2507)

tools/run-tests.py: shlex.split() the value of --command-prefix (Chromium issue 171553)

Fixed pattern detection for replacing shifts by rotation. (Chromium issue 2499)

Performance and stability improvements on all platforms.

git-svn-id: http://v8.googlecode.com/svn/trunk@13473 ce2b1a6d-e550-0410-aec6-3dcde31c8c00