gd: security bump to version 2.2.2

gd: security bump to version 2.2.2

Drop upstreamed patches.
Drop autoreconf since it's no longer required.
Patch 0002-no-zlib.patch is no longer required, and is in fact harmful.
Update homepage URL.

Fixes:
CVE-2015-8874 - #215 Stack overflow with gdImageFillToBorder
CVE-2016-3074 - gd2: handle corrupt images better
CVE-2016-5767 - Integer Overflow in gdImagePaletteToTrueColor()
resulting in heap overflow

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>