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/tools/backup/tsm-client/test-cli.nix

@@ -0,0 +1,58 @@
+{ lib
+, writeText
+, runCommand
+, tsm-client
+}:
+
+# Let the client try to connect to a server.
+# We can't simulate a server, so there's no more to test.
+
+let
+
+  # 192.0.0.8 is a "dummy address" according to RFC 7600
+  dsmSysCli = writeText "cli.dsm.sys" ''
+    defaultserver  testserver
+    server  testserver
+      commmethod  v6tcpip
+      tcpserveraddress  192.0.0.8
+      nodename  ARBITRARYNODENAME
+  '';
+
+  tsm-client_ = tsm-client.override { inherit dsmSysCli; };
+
+  env.nativeBuildInputs = [ tsm-client_ ];
+
+  versionString =
+    let
+      inherit (tsm-client_.passthru.unwrapped) version;
+      major = lib.versions.major version;
+      minor = lib.versions.minor version;
+      patch = lib.versions.patch version;
+      fixup = lib.lists.elemAt (lib.versions.splitVersion version) 3;
+    in
+      "Client Version ${major}, Release ${minor}, Level ${patch}.${fixup}";
+
+in
+
+runCommand "${tsm-client.name}-test-cli" env ''
+  set -o nounset
+  set -o pipefail
+
+  export DSM_LOG=$(mktemp -d ./dsm_log.XXXXXXXXXXX)
+
+  { dsmc -optfile=/dev/null || true; } | tee dsmc-stdout
+
+  # does it report the correct version?
+  grep --fixed-strings '${versionString}' dsmc-stdout
+
+  # does it use the provided dsm.sys config file?
+  # if it does, it states the node's name
+  grep ARBITRARYNODENAME dsmc-stdout
+
+  # does it try (and fail) to connect to the server?
+  # if it does, it reports the "TCP/IP connection failure" error code
+  grep ANS1017E dsmc-stdout
+  grep ANS1017E $DSM_LOG/dsmerror.log
+
+  touch $out
+''