RFR(XS): 8220690: ATTRIBUTE_ALIGNED requires GNU extensions enabled

[Kim Barrett]

> On Mar 19, 2019, at 4:41 AM, Aleksey Shipilev <shade at redhat.com> wrote:
> 
> On 3/15/19 11:18 PM, Kim Barrett wrote:
>> Webrev:
>> http://cr.openjdk.java.net/~kbarrett/8220690/open.00/
> 
> I am fine with it.
> 
> Severin, can you test jdk/jdk still builds on old RHEL with this patch?
> 
> -Aleksey

Thanks.