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/servers/x11/quartz-wm/extern-patch.patch

@@ -0,0 +1,13 @@
+diff --git a/src/x-list.h b/src/x-list.h
+index bb85c02..059c88b 100644
+--- a/src/x-list.h
++++ b/src/x-list.h
+@@ -39,7 +39,7 @@
+ #endif
+ 
+ #ifndef X_EXTERN
+-# define X_EXTERN __private_extern__
++# define X_EXTERN extern
+ #endif
+ 
+ X_EXTERN void X_PFX (list_free_1) (x_list *node);