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/X11/xpra/fix-41106.patch

@@ -0,0 +1,15 @@
+diff --git a/xpra/server/server_util.py b/xpra/server/server_util.py
+index f46998ee9f..60068f21b6 100644
+--- a/xpra/server/server_util.py
++++ b/xpra/server/server_util.py
+@@ -157,6 +157,10 @@ def xpra_env_shell_script(socket_dir, env):
+     return b"\n".join(script)
+ 
+ def xpra_runner_shell_script(xpra_file, starting_dir):
++    # Nixpkgs contortion:
++    # xpra_file points to a shell wrapper, not to the python script.
++    dirname, basename = os.path.split(xpra_file)
++    xpra_file = os.path.join(dirname, "."+basename+"-wrapped")
+     script = []
+     # We ignore failures in cd'ing, b/c it's entirely possible that we were
+     # started from some temporary directory and all paths are absolute.