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/applications/misc/octoprint/pip-path.patch

@@ -0,0 +1,12 @@
+diff --git a/src/octoprint/util/pip.py b/src/octoprint/util/pip.py
+index 53500e5d5..39f76c1e5 100644
+--- a/src/octoprint/util/pip.py
++++ b/src/octoprint/util/pip.py
+@@ -284,6 +284,7 @@ class PipCaller(CommandlineCaller):
+     @classmethod
+     def autodetect_pip(cls):
+         commands = [
++            ["@pip@"],
+             [sys.executable, "-m", "pip"],
+             [
+                 os.path.join(