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/python-modules/pytest-xdist/setup-hook.sh

@@ -0,0 +1,18 @@
+pytestXdistHook() {
+    pytestFlagsArray+=(
+        "--numprocesses=$NIX_BUILD_CORES"
+        "--forked"
+    )
+}
+
+# the flags should be added before pytestCheckHook runs so
+# until we have dependency mechanism in generic builder, we need to use this ugly hack.
+
+if [ -z "${dontUsePytestXdist-}" ] && [ -z "${dontUsePytestCheck-}" ]; then
+    if [[ " ${preDistPhases:-} " =~ " pytestCheckPhase " ]]; then
+        preDistPhases+=" "
+        preDistPhases="${preDistPhases/ pytestCheckPhase / pytestXdistHook pytestCheckPhase }"
+    else
+        preDistPhases+=" pytestXdistHook"
+    fi
+fi