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/interpreters/python/hooks/python-imports-check-hook.sh

@@ -0,0 +1,16 @@
+# Setup hook for checking whether Python imports succeed
+echo "Sourcing python-imports-check-hook.sh"
+
+pythonImportsCheckPhase () {
+    echo "Executing pythonImportsCheckPhase"
+
+    if [ -n "$pythonImportsCheck" ]; then
+        echo "Check whether the following modules can be imported: $pythonImportsCheck"
+        ( cd $out && eval "@pythonCheckInterpreter@ -c 'import os; import importlib; list(map(lambda mod: importlib.import_module(mod), os.environ[\"pythonImportsCheck\"].split()))'" )
+    fi
+}
+
+if [ -z "${dontUsePythonImportsCheck-}" ]; then
+    echo "Using pythonImportsCheckPhase"
+    preDistPhases+=" pythonImportsCheckPhase"
+fi