Revert "Fix stack alignment corruption for MinGW32 build"

due to compile failures.

This reverts r15480.

R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/18649002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15483 ce2b1a6d-e550-0410-aec6-3dcde31c8c00