media-gfx/gimp: epatch->PATCHES=()

media-gfx/gimp: epatch->PATCHES=()

This one was a bit strange; just moving all the patches into a PATCHES=()
array and calling default at the start of src_prepare() didn't do the
trick, as apparently it was applying the patches twice. Apparently
gnome2_src_configure calls xdg_src_configure, which calls default.
Moving gnome2_src_configure to the start of src_prepare() worked.

Due to how involved the change was, I gave this a full
ebuild gimp-2.9.8-r1.ebuild clean install treatment instead of my
standard clean prepare for these patch fixes.

Package-Manager: Portage-2.3.31, Repoman-2.3.9