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>

lib/tests/release.nix

@@ -0,0 +1,40 @@
+{ # The pkgs used for dependencies for the testing itself
+  # Don't test properties of pkgs.lib, but rather the lib in the parent directory
+  pkgs ? import ../.. {} // { lib = throw "pkgs.lib accessed, but the lib tests should use nixpkgs' lib path directly!"; }
+}:
+
+pkgs.runCommand "nixpkgs-lib-tests" {
+  buildInputs = [
+    pkgs.nix
+    (import ./check-eval.nix)
+    (import ./maintainers.nix {
+      inherit pkgs;
+      lib = import ../.;
+    })
+  ];
+} ''
+    datadir="${pkgs.nix}/share"
+    export TEST_ROOT=$(pwd)/test-tmp
+    export NIX_BUILD_HOOK=
+    export NIX_CONF_DIR=$TEST_ROOT/etc
+    export NIX_LOCALSTATE_DIR=$TEST_ROOT/var
+    export NIX_LOG_DIR=$TEST_ROOT/var/log/nix
+    export NIX_STATE_DIR=$TEST_ROOT/var/nix
+    export NIX_STORE_DIR=$TEST_ROOT/store
+    export PAGER=cat
+    cacheDir=$TEST_ROOT/binary-cache
+
+    mkdir -p $NIX_CONF_DIR
+    echo "experimental-features = nix-command" >> $NIX_CONF_DIR/nix.conf
+
+    nix-store --init
+
+    cp -r ${../.} lib
+    echo "Running lib/tests/modules.sh"
+    bash lib/tests/modules.sh
+
+    echo "Running lib/tests/sources.sh"
+    TEST_LIB=$PWD/lib bash lib/tests/sources.sh
+
+    touch $out
+''