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/backup/hpe-ltfs/remove-sysctl.patch

@@ -0,0 +1,14 @@
+diff --git a/src/libltfs/arch/arch_info.c b/src/libltfs/arch/arch_info.c
+index 179428f..114acf0 100644
+--- a/src/libltfs/arch/arch_info.c
++++ b/src/libltfs/arch/arch_info.c
+@@ -47,9 +47,6 @@
+ */
+ 
+ #include "libltfs/ltfs.h"
+-#ifndef mingw_PLATFORM
+-#include <sys/sysctl.h>
+-#endif
+ #include <sys/types.h>
+ #include <sys/stat.h>
+ #include <unistd.h>