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/tools/godot/dont_clobber_environment.patch

@@ -0,0 +1,19 @@
+diff --git a/SConstruct b/SConstruct
+index d138c7b250..c925bf908e 100644
+--- a/SConstruct
++++ b/SConstruct
+@@ -65,10 +65,10 @@ elif platform_arg == "javascript":
+ # want to have to pull in manually.
+ # Then we prepend PATH to make it take precedence, while preserving SCons' own entries.
+ env_base = Environment(tools=custom_tools)
+-env_base.PrependENVPath("PATH", os.getenv("PATH"))
+-env_base.PrependENVPath("PKG_CONFIG_PATH", os.getenv("PKG_CONFIG_PATH"))
+-if "TERM" in os.environ:  # Used for colored output.
+-    env_base["ENV"]["TERM"] = os.environ["TERM"]
++for k in ("TERM", "PATH", "PKG_CONFIG_PATH"):
++    if (k in os.environ):
++        env_base["ENV"][k] = os.environ[k]
++
+
+ env_base.disabled_modules = []
+ env_base.use_ptrcall = False