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/development/tools/vagrant/unofficial-installation-nowarn.patch

@@ -0,0 +1,16 @@
+diff --git a/bin/vagrant b/bin/vagrant
+index 0e6abdc..cb36e9c 100755
+--- a/bin/vagrant
++++ b/bin/vagrant
+@@ -155,11 +155,6 @@ begin
+     end
+   end
+ 
+-  if !Vagrant.in_installer? && !Vagrant.very_quiet?
+-    # If we're not in the installer, warn.
+-    env.ui.warn(I18n.t("vagrant.general.not_in_installer") + "\n", prefix: false)
+-  end
+-
+   # Acceptable experimental flag values include:
+   #
+   # Unset  - Disables experimental features