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/editors/aseprite/skia-make-deps.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+FILTER=$1
+OUT=skia-deps.nix
+REVISION=89e4ca4352d05adc892f5983b108433f29b2c0c2
+DEPS=$(curl -s https://raw.githubusercontent.com/aseprite/skia/$REVISION/DEPS)
+THIRD_PARTY_DEPS=$(echo "$DEPS" | grep third_party | grep "#" -v | sed 's/"//g')
+
+function write_fetch_defs ()
+{
+  while read -r DEP; do
+    NAME=$(echo "$DEP" | cut -d: -f1 | cut -d/ -f3 | sed 's/ //g')
+    URL=$(echo "$DEP" | cut -d: -f2- | cut -d@ -f1 | sed 's/ //g')
+    REV=$(echo "$DEP" | cut -d: -f2- | cut -d@ -f2 | sed 's/[ ,]//g')
+
+    echo "Fetching $NAME@$REV"
+    PREFETCH=$(nix-prefetch-git --rev "$REV" "$URL")
+
+(
+cat <<EOF
+  $NAME = fetchgit {
+    url = "$URL";
+    rev = "$REV";
+    sha256 = $(echo $PREFETCH | jq '.sha256');
+  };
+EOF
+) >> "$OUT"
+
+  echo "----------"
+  echo
+  done <<< "$1"
+}
+
+echo "{ fetchgit }:" > "$OUT"
+echo "{" >> "$OUT"
+write_fetch_defs "$(echo "$THIRD_PARTY_DEPS" | grep -E "$FILTER")"
+echo "}" >> "$OUT"