buildroot

gd: bump to version 2.1.1

Also add hash file.
Remove CVE patch since it's upstream.
Rename patches to new naming convention.
Kill some whitespace.

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