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/os-specific/bsd/netbsd/install-setup-hook.sh

@@ -0,0 +1,8 @@
+addNetBSDInstallMakeFlags() {
+  export INSTALL_FILE="install -U -c"
+  export INSTALL_DIR="install -U -d"
+  export INSTALL_LINK="install -U -l h"
+  export INSTALL_SYMLINK="install -U -l s"
+}
+
+preConfigureHooks+=(addNetBSDInstallMakeFlags)