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/science/logic/isabelle/components/mkBuild.nix

@@ -0,0 +1,36 @@
+{ isabelle, path }:
+
+let
+  dir = "$out/isabelle/${isabelle.dirname}";
+  iDir = "${isabelle}/${isabelle.dirname}";
+in ''
+  shopt -s extglob
+  mkdir -p ${dir}/lib/classes
+
+  cDir=$out/${isabelle.dirname}/contrib/${path}
+  mkdir -p $cDir
+  cp -r !(isabelle) $cDir
+
+  cd ${dir}
+  ln -s ${iDir}/!(lib|bin) ./
+  ln -s ${iDir}/lib/!(classes) lib/
+  ln -s ${iDir}/lib/classes/* lib/classes/
+
+  mkdir bin/
+  cp ${iDir}/bin/* bin/
+
+  export HOME=$TMP
+  bin/isabelle components -u $cDir
+  bin/isabelle scala_build
+
+  cd lib/classes
+  for f in ${iDir}/lib/classes/*; do
+    rm $(basename $f)
+  done
+
+  lDir=$out/${isabelle.dirname}/lib/classes/
+  mkdir -p $lDir
+  cp -r * $lDir
+  cd $out
+  rm -rf isabelle
+''