Make JsNative1JsNative2JsSample cctest work on Win Release

MSVC optimization realizes that CallJsFunction2 is just the same as CallJsFunction, so it eliminates the former making the call stack contain two instances of the same function.

The patch makes two functions distinct.

LOG=N
BUG=v8:3055
R=aandrey@chromium.org, jkummerow@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/357383003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22113 ce2b1a6d-e550-0410-aec6-3dcde31c8c00