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/pip-install-hook.sh

@@ -0,0 +1,24 @@
+# Setup hook for pip.
+echo "Sourcing pip-install-hook"
+
+declare -a pipInstallFlags
+
+pipInstallPhase() {
+    echo "Executing pipInstallPhase"
+    runHook preInstall
+
+    mkdir -p "$out/@pythonSitePackages@"
+    export PYTHONPATH="$out/@pythonSitePackages@:$PYTHONPATH"
+
+    pushd dist || return 1
+    @pythonInterpreter@ -m pip install ./*.whl --no-index --no-warn-script-location --prefix="$out" --no-cache $pipInstallFlags
+    popd || return 1
+
+    runHook postInstall
+    echo "Finished executing pipInstallPhase"
+}
+
+if [ -z "${dontUsePipInstall-}" ] && [ -z "${installPhase-}" ]; then
+    echo "Using pipInstallPhase"
+    installPhase=pipInstallPhase
+fi