RFR: 8243591: Change to GCC 9.2 for building Linux/aarch64 at Oracle

[Tim Bell]

Mikael:

> The gcc version used to build linux/x64 at Oracle was recently bumped to 9.2.0, linux/aarch64 should follow suit:
> 
> JBS: https://bugs.openjdk.java.net/browse/JDK-8243591 <https://bugs.openjdk.java.net/browse/JDK-8243591>
> webrev: https://cr.openjdk.java.net/~mikael/webrevs/8243591/webrev.00/open/webrev <https://cr.openjdk.java.net/~mikael/webrevs/8243591/webrev.00/open/webrev>
> 
> Cheers,
> Mikael

Looks good.

Tim