uv_rwlock_try* and uv_mutex_try* problem.

uv_rwlock_try\* and uv_mutex_try throws SIGABRT.

```
<?php
$lock = uv_mutex_init();

uv_mutex_lock($lock);
if (uv_mutex_trylock($lock)) {  // throws SIGABRT
    echo "OK" . PHP_EOL;
} else {
    echo "FAILED" . PHP_EOL;
}
```
