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/shells/bash/update-patch-set.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env nix-shell
+#!nix-shell --pure -i bash -p wget -p gnupg -p cacert -p nix
+
+# Update patch set for GNU Bash or Readline.
+
+if [ $# -ne 2 ]
+then
+    echo "Usage: $(basename "$0") PROJECT VERSION"
+    echo ""
+    echo "Update the patch set for PROJECT (one of \`bash' or \`readline') for"
+    echo "the given version (e.g., \`4.0').  Produce \`PROJECT-patches.nix'."
+    exit 1
+fi
+
+PROJECT="$1"
+VERSION="$2"
+DIR=$(dirname "$0")
+VERSION_CONDENSED="$(echo "$VERSION" | sed -es/\\.//g)"
+PATCH_LIST="$DIR/$PROJECT-$VERSION-patches.nix"
+
+set -e
+
+rm -vf "$PATCH_LIST"
+
+wget "https://tiswww.case.edu/php/chet/gpgkey.asc"
+echo "4ef5051ce7200241e65d29c11eb57df8  gpgkey.asc" > gpgkey.asc.md5
+md5sum -c gpgkey.asc.md5
+gpg --import ./gpgkey.asc
+rm gpgkey.asc{,.md5}
+
+( echo "# Automatically generated by \`$(basename "$0")'; do not edit." ;	\
+  echo "" ;								\
+  echo "patch: [" )							\
+>> "$PATCH_LIST"
+
+for i in {001..100}
+do
+    wget -P "$DIR" "ftp.gnu.org/gnu/$PROJECT/$PROJECT-$VERSION-patches/$PROJECT$VERSION_CONDENSED-$i" || break
+    wget -P "$DIR" "ftp.gnu.org/gnu/$PROJECT/$PROJECT-$VERSION-patches/$PROJECT$VERSION_CONDENSED-$i.sig"
+    gpg --verify "$DIR/$PROJECT$VERSION_CONDENSED-$i.sig"
+    hash=$(nix-hash --flat --type sha256 --base32 "$DIR/$PROJECT$VERSION_CONDENSED-$i")
+    echo "(patch \"$i\" \"$hash\")"	\
+    >> "$PATCH_LIST"
+
+    rm -f "$DIR/$PROJECT$VERSION_CONDENSED-$i"{,.sig}
+done
+
+echo "]" >> "$PATCH_LIST"
+
+# bash interprets numbers starting with 0 as octals
+echo "Got $((10#$i - 1)) patches."
+echo "Patch list has been written to \`$PATCH_LIST'."