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/python-modules/imageio-ffmpeg/ffmpeg-path.patch

@@ -0,0 +1,39 @@
+diff --git a/imageio_ffmpeg/_utils.py b/imageio_ffmpeg/_utils.py
+index 1399cfd..c0eb9be 100644
+--- a/imageio_ffmpeg/_utils.py
++++ b/imageio_ffmpeg/_utils.py
+@@ -23,33 +23,7 @@ def get_ffmpeg_exe():
+     if exe:
+         return exe
+ 
+-    plat = get_platform()
+-
+-    # 2. Try from here
+-    bin_dir = resource_filename("imageio_ffmpeg", "binaries")
+-    exe = os.path.join(bin_dir, FNAME_PER_PLATFORM.get(plat, ""))
+-    if exe and os.path.isfile(exe) and _is_valid_exe(exe):
+-        return exe
+-
+-    # 3. Try binary from conda package
+-    # (installed e.g. via `conda install ffmpeg -c conda-forge`)
+-    if plat.startswith("win"):
+-        exe = os.path.join(sys.prefix, "Library", "bin", "ffmpeg.exe")
+-    else:
+-        exe = os.path.join(sys.prefix, "bin", "ffmpeg")
+-    if exe and os.path.isfile(exe) and _is_valid_exe(exe):
+-        return exe
+-
+-    # 4. Try system ffmpeg command
+-    exe = "ffmpeg"
+-    if _is_valid_exe(exe):
+-        return exe
+-
+-    # Nothing was found
+-    raise RuntimeError(
+-        "No ffmpeg exe could be found. Install ffmpeg on your system, "
+-        "or set the IMAGEIO_FFMPEG_EXE environment variable."
+-    )
++    return '@ffmpeg@'
+ 
+ 
+ def _popen_kwargs(prevent_sigint=False):