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/setup-hook.sh

@@ -0,0 +1,15 @@
+mergeNetBSDSourceDir() {
+  # merge together all extra paths
+  # there should be a better way to do this
+  chmod -R u+w $BSDSRCDIR
+  for path in $extraPaths; do
+    rsync -Er --chmod u+w $path/ $BSDSRCDIR/
+  done
+}
+
+addNetBSDMakeFlags() {
+  makeFlags="INCSDIR=${!outputDev}/include $makeFlags"
+}
+
+postUnpackHooks+=(mergeNetBSDSourceDir)
+preConfigureHooks+=(addNetBSDMakeFlags)