Added support for building V8 on Windows with either the shared or static version of MSVCRT. The selection of the MSVCRT version is through the new SCons flag  msvcrt which can have values static or shared with static being the default.
Review URL: http://codereview.chromium.org/11564

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@817 ce2b1a6d-e550-0410-aec6-3dcde31c8c00