[wwwdocs] document new options in gcc-8/changes.html

[Jason Merrill]

OK.

On Wed, Apr 11, 2018 at 3:13 PM, Martin Sebor <msebor@gmail.com> wrote:
> Ping: https://gcc.gnu.org/ml/gcc-patches/2018-04/msg00219.html
>
> There's one outstanding typo that Paolo noticed since I posted
> the update.  I'll fix that before committing.
>
>
> On 04/04/2018 04:28 PM, Martin Sebor wrote:
>>
>> Attached is an updated diff rebased on top of the latest revision
>> of the file.  This new version fixes the typos Paolo pointed out
>> (thanks) and adds a few more options:
>>
>> -Wmissing-attributes, -Wif-not-aligned, and -Wpacked-not-aligned.
>>
>> I used a spell-checker this time to (hopefully) minimize the typos.
>>
>> The rest of the changes are described here:
>> https://gcc.gnu.org/ml/gcc-patches/2018-04/msg00121.html
>>
>> Martin
>
>