RFR: Update build documentation to reflect compiler upgrades at Oracle

[Martin Buchholz]

+ macOS              Apple Xcode 9.4 (using clang 9.1.0)

Is there really such a thing as clang 9.1.0, given that 6.0.1 is the latest
from http://releases.llvm.org/ ?

On Mon, Jul 23, 2018 at 10:13 AM, Erik Joelsson <erik.joelsson at oracle.com>
wrote:

> The build documentation needs to be updated to reflect the compiler
> updates that took place at Oracle for JDK 11.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8208096
>
> Webrev: http://cr.openjdk.java.net/~erikj/8208096/webrev.01/
>
> /Erik
>
>