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/applications/misc/far2l/python_prebuild.patch

@@ -0,0 +1,20 @@
+diff --git i/python/src/prebuild.sh w/python/src/prebuild.sh
+index d2847ee5..aa1ecc53 100755
+--- i/python/src/prebuild.sh
++++ w/python/src/prebuild.sh
+@@ -12,9 +12,6 @@ mkdir -p "$DST/incpy"
+ if [ ! -f "$DST/python/.prepared" ]; then
+ 	echo "Preparing python virtual env at $DST/python using $PYTHON"
+ 	mkdir -p "$DST/python"
+-	$PYTHON -m venv --system-site-packages "$DST/python"
+-	"$DST/python/bin/python" -m pip install --upgrade pip || true
+-	"$DST/python/bin/python" -m pip install --ignore-installed cffi debugpy pcpp
+ 	$PREPROCESSOR "$SRC/python/src/consts.gen" | sh > "${DST}/incpy/consts.h"
+ 
+ 	echo "1" > "$DST/python/.prepared"
+@@ -26,4 +23,4 @@ cp -f -R \
+ 	"$SRC/python/configs/plug/far2l/"* \
+ 	"$DST/incpy/"
+ 
+-"$DST/python/bin/python" "$SRC/python/src/pythongen.py" "${SRC}" "${DST}/incpy"
++"python" "$SRC/python/src/pythongen.py" "${SRC}" "${DST}/incpy"