Throw syntax error when a getter/setter has the wrong number of params

We used to allow any number of parameters in getters and setters to
match JSC. This is a violation of ES5.1 and both SpiderMonkey and
Chakra throw on these syntax errors.

BUG=v8:3371
LOG=Y
R=marja@chromium.org

Review URL: https://codereview.chromium.org/329413002

Patch from Erik Arvidsson <arv@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21868 ce2b1a6d-e550-0410-aec6-3dcde31c8c00