C++ alignas keyword

[Chris Gregory]

It seems Emacs doesn't highlight nor support (at least for
end-of-defun purposes) the alignas keyword.

For example,

template <class T, size_t static_len>
class alignas(T) Array {
    char buffer[sizeof(T) * static_len];
};

Could parsing this syntax be added to cc-mode?  At the very least
recognizing it as a keyword would be nice.

-- 
Chris Gregory