RFR: 8253089: Windows (MSVC 2017) build fails after JDK-8243208

[Ioi Lam]

On Mon, 14 Sep 2020 12:58:35 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> It seems that MSVC 2017 is getting confused about the differences in `unsigned int` and `u2`. After a few attempts at
> fixing this, I think we need to use `u2` consistently for hash code computations. `u2` is the final storage type for
> the hash code in `JVMFlagLookup::_hashes`.

Marked as reviewed by iklam (Reviewer).

-------------

PR: https://git.openjdk.java.net/jdk/pull/150