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/embedded/platformio/fix-searchpath.patch

@@ -0,0 +1,13 @@
+diff --git a/platformio/proc.py b/platformio/proc.py
+index 80e50201..15cee5a5 100644
+--- a/platformio/proc.py
++++ b/platformio/proc.py
+@@ -181,7 +181,7 @@ def copy_pythonpath_to_osenv():
+             conditions.append(isdir(join(p, "click")) or isdir(join(p, "platformio")))
+         if all(conditions):
+             _PYTHONPATH.append(p)
+-    os.environ["PYTHONPATH"] = os.pathsep.join(_PYTHONPATH)
++    os.environ["PYTHONPATH"] = os.pathsep.join(sys.path)
+ 
+ 
+ def where_is_program(program, envpath=None):