V8 can now be build with MinGW. It still fails the following four tests in debug mode:

  mjsunit/parse-int-float
  mjsunit/mirror-array.js
  mjsunit/integer-to-string.js
  mjsunit/regress/regress-114.js

Building with MinGW has been tested with version 5.1.4 using GCC 3.4.5.

In addition to supporting MinGW this change also makes it more explicit which targets needs to link with which libraries.

BUG=64
Review URL: http://codereview.chromium.org/20177

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1240 ce2b1a6d-e550-0410-aec6-3dcde31c8c00