[OE-core] [PATCH] libpng: upgrade to 1.6.30

[Maxin B. John]

Hi Ross,

On Mon, Jul 24, 2017 at 10:12:16AM +0100, Burton, Ross wrote:
>Fails on beaglebone:
>
>../libpng-1.6.30/arm/../pngpriv.h:476: Error: bad instruction `typedef unsigned long png_ptruint'
>
>Ross

Will fix this one and resend it.  

>>On 20 July 2017 at 12:51, Maxin B. John <maxin.john at intel.com> wrote:
>>
>>    1.6.29 -> 1.6.30
>>
>>        No changes in License.The license checksums changed because of
>>            update in Copyright dates in LICENSE and png.h files.

Best Regards,
Maxin