Lowered limit on code space for systems with low memory supply.

Allowed compiling v8_shell with the 'host' toolset (issue 82437).

Extended setBreakpoint API to accept partial script name (issue 1418).

Made multi-line comments not count when deciding whether the '-->'
comment starter is first on a line. This matches Safari.

Made handling of non-array recievers in Array length setter correct (issue 1491).

Added ability to heap profiler to iterate over snapshot's node (issue 1481).

Review URL: http://codereview.chromium.org/7232010

git-svn-id: http://v8.googlecode.com/svn/trunk@8386 ce2b1a6d-e550-0410-aec6-3dcde31c8c00