RFR: Add gitignore for build directory

[Jesper Wilhelmsson]

You are Author in two OpenJDK projects, Amber and Valhalla: http://openjdk.java.net/census#karianna
And you do have an JBS account: https://bugs.openjdk.java.net/secure/ViewProfile.jspa?name=karianna
Are you logged in to JBS when trying to create the issue?

Anyhow, your OCA was recognized and everything seems to be ok for the fix to be pushed now :-)
/Jesper


> On 28 May 2020, at 14:22, Martijn Verburg <martijnverburg at gmail.com> wrote:
> 
> Hi Jesper, sadly I'm only a Contributor, not an Author, and therefore
> cannot open an issue in JBS...
> 
> Cheers,
> Martijn
> 
> 
> On Thu, 28 May 2020 at 11:21, Jesper Wilhelmsson <jwilhelm at openjdk.java.net>
> wrote:
> 
>> On Wed, 27 May 2020 14:30:39 GMT, Martijn Verburg <github.com+
>> 180840+karianna at openjdk.org> wrote:
>> 
>>>> Looks good. Thanks for adding this! I've been meaning to :-)
>>>> I'll sponsor this as you are not an author in this project yet.
>>> 
>>>> Looks good. Thanks for adding this! I've been meaning to :-)
>>>> I'll sponsor this as you are not an author in this project yet.
>>> 
>>> Thanks.  Any way of getting the bot to recognize that I _have_ signed
>> the OCA already?
>> 
>> Please follow the instruction above to open an issue in JBS to get your
>> user name tied to your GitHub account. Robin is
>> standing by to approve it ��
>> 
>> -------------
>> 
>> PR: https://git.openjdk.java.net/guide/pull/12
>>