RFR (XS): Disable stack alignment assertion

[Arthur Eubanks]

LGTM

On Sat, Jun 22, 2019 at 5:43 PM Man Cao <manc at google.com> wrote:

> Hi,
>
> Can I have reviews for this?
> https://cr.openjdk.java.net/~manc/tsan20190621/webrev.00/
> Comment out stack alignment assertion in os::verify_stack_alignment().
> Currently Clang build fails under fastdebug due to this assertion failure.
> Note that our internal JDK11 also commented out this assertion.
>
> -Man
>