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>

nixos/tests/mysql/mysql-autobackup.nix

@@ -0,0 +1,53 @@
+{
+  system ? builtins.currentSystem,
+  config ? {},
+  pkgs ? import ../../.. { inherit system config; },
+  lib ? pkgs.lib
+}:
+
+let
+  inherit (import ./common.nix { inherit pkgs lib; }) mkTestName mariadbPackages;
+
+  makeTest = import ./../make-test-python.nix;
+
+  makeAutobackupTest = {
+    package,
+    name ? mkTestName package,
+  }: makeTest {
+    name = "${name}-automysqlbackup";
+    meta.maintainers = [ lib.maintainers.aanderse ];
+
+    nodes.machine = {
+      services.mysql = {
+        inherit package;
+        enable = true;
+        initialDatabases = [ { name = "testdb"; schema = ./testdb.sql; } ];
+      };
+
+      services.automysqlbackup.enable = true;
+    };
+
+    testScript = ''
+      start_all()
+
+      # Need to have mysql started so that it can be populated with data.
+      machine.wait_for_unit("mysql.service")
+
+      with subtest("Wait for testdb to be fully populated (5 rows)."):
+          machine.wait_until_succeeds(
+              "mysql -u root -D testdb -N -B -e 'select count(id) from tests' | grep -q 5"
+          )
+
+      with subtest("Do a backup and wait for it to start"):
+          machine.start_job("automysqlbackup.service")
+          machine.wait_for_job("automysqlbackup.service")
+
+      with subtest("wait for backup file and check that data appears in backup"):
+          machine.wait_for_file("/var/backup/mysql/daily/testdb")
+          machine.succeed(
+              "${pkgs.gzip}/bin/zcat /var/backup/mysql/daily/testdb/daily_testdb_*.sql.gz | grep hello"
+          )
+      '';
+  };
+in
+  lib.mapAttrs (_: package: makeAutobackupTest { inherit package; }) mariadbPackages