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/stdenv/common-path.nix

@@ -0,0 +1,15 @@
+{pkgs}: [
+  pkgs.coreutils
+  pkgs.findutils
+  pkgs.diffutils
+  pkgs.gnused
+  pkgs.gnugrep
+  pkgs.gawk
+  pkgs.gnutar
+  pkgs.gzip
+  pkgs.bzip2.bin
+  pkgs.gnumake
+  pkgs.bash
+  pkgs.patch
+  pkgs.xz.bin
+]