Action icons: add gtk-ok.svg as a symbolic link of dialog-ok.svg
Action icons: add gtk-ok.svg as a symbolic link of dialog-ok.svg

The icon-naming-utils utility doesn't take care of this alias, so we
do the symbolic link in the Makefile.  The alias is needed for stock
icons with Gtk.STOCK_OK id.

Fixes #4010 .

samdroid-apps/sugar-artwork,i5o/sugar-artwork,i5o/sugar-artwork,godiard/sugar-artwork,i5o/sugar-artwork,tchx84/debian-pkg-sugar-artwork,godiard/sugar-artwork,sugarlabs/sugar-artwork,tchx84/debian-pkg-sugar-artwork,sugarlabs/sugar-artwork,godiard/sugar-artwork,samdroid-apps/sugar-artwork,tchx84/debian-pkg-sugar-artwork,sugarlabs/sugar-artwork,samdroid-apps/sugar-artwork