uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/tools/networking/dhcp/set-hostname.patch

@@ -0,0 +1,12 @@
+--- a/client/scripts/linux	2010-09-15 00:49:48.000000000 +0200
++++ b/client/scripts/linux	2011-04-01 16:08:10.984372269 +0200
+@@ -133,9 +133,7 @@
+            [ "$current_hostname" = '(none)' ] ||
+            [ "$current_hostname" = 'localhost' ] ||
+            [ "$current_hostname" = "$old_host_name" ]; then
+-           if [ "$new_host_name" != "$old_host_name" ]; then
+-               hostname "$new_host_name"
+-           fi
++           hostname "$new_host_name"
+         fi
+     fi