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/video/mythtv/disable-os-detection.patch

@@ -0,0 +1,31 @@
+--- a/configure	2020-07-21 20:50:58.653989766 +0200
++++ b/configure	2020-07-21 20:52:21.236610586 +0200
+@@ -6537,17 +6537,17 @@
+                 }
+ 
+ enable enforce_wshadow
+-case $target_os in
+-    android)
+-        disable enforce_wshadow
+-        ;;
+-    linux)
+-        . /etc/os-release
+-        if test $ID = "centos"; then
+-            disable enforce_wshadow
+-        fi
+-        ;;
+-esac
++#case $target_os in
++#    android)
++#        disable enforce_wshadow
++#        ;;
++#    linux)
++#        . /etc/os-release
++#        if test $ID = "centos"; then
++#            disable enforce_wshadow
++#        fi
++#        ;;
++#esac
+ 
+ if $(pkg-config --exists Qt5WebKit) || $(pkg-config --exists QtWebKit) ; then
+     enable qtwebkit