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/development/libraries/grantlee/5/setup-hook.sh

@@ -0,0 +1,13 @@
+grantleePluginPrefix=@grantleePluginPrefix@
+
+providesGrantleeRuntime() {
+    [ -d "$1/$grantleePluginPrefix" ]
+}
+
+_grantleeEnvHook() {
+    if providesGrantleeRuntime "$1"; then
+        propagatedBuildInputs+=" $1"
+        propagatedUserEnvPkgs+=" $1"
+    fi
+}
+addEnvHooks "$hostOffset" _grantleeEnvHook