Watchdog doesn't work as expected for some tail calls

[Yijia Huang]

Options "--watchdog=1000 --watchdog-exception-ok" suppose to let jsc terminate a hanging Javascript program with a time out 1000ms. However, the options fail on this example with a ToT build.
```
function foo(a) {
    'use strict';
    return foo(a, 0);
}

foo(1);
```

[Mark Lam]

Looks like global common subexpression elimination eliminated an InvalidationPoint.  That's the reason the watchdog wasn't able to terminate the script.

[Yijia Huang]

We added a --usePollingTraps=true option to stress test call-link-info-osrexit-repatch.js as a workaround. We should remove that once we fix this problem.

[Radar WebKit Bug Importer]

<rdar://problem/96239507>