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/applications/networking/misc/zammad/0001-nulldb.patch

@@ -0,0 +1,15 @@
+diff --git a/config/application.rb b/config/application.rb
+index d85a17491..90ea5e387 100644
+--- a/config/application.rb
++++ b/config/application.rb
+@@ -3,6 +3,7 @@
+ require_relative 'boot'
+ 
+ require 'rails/all'
++require 'nulldb'
+ require_relative 'issue_2656_workaround_for_rails_issue_33600'
+ 
+ # DO NOT REMOVE THIS LINE - see issue #2037
+diff --git a/db/schema.rb b/db/schema.rb
+new file mode 100644
+index 000000000..e69de29bb