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/build-support/release/binary-tarball.nix

@@ -0,0 +1,78 @@
+/* This function builds a binary tarball.  The resulting binaries are
+   usually only useful if they are don't have any runtime dependencies
+   on any paths in the Nix store, since those aren't distributed in
+   the tarball.  For instance, the binaries should be statically
+   linked: they can't depend on dynamic libraries in the store
+   (including Glibc).
+
+   The binaries are built and installed with a prefix of /usr/local by
+   default.  They are installed by setting DESTDIR to a temporary
+   directory, so the Makefile of the package should support DESTDIR.
+*/
+
+{ src, stdenv
+, name ? "binary-tarball"
+, ... } @ args:
+
+stdenv.mkDerivation (
+
+  {
+    # Also run a `make check'.
+    doCheck = true;
+
+    showBuildStats = true;
+
+    prefix = "/usr/local";
+
+    postPhases = "finalPhase";
+  }
+
+  // args //
+
+  {
+    name = name + (if src ? version then "-" + src.version else "");
+
+    postHook = ''
+      mkdir -p $out/nix-support
+      echo "$system" > $out/nix-support/system
+      . ${./functions.sh}
+
+      origSrc=$src
+      src=$(findTarball $src)
+
+      if test -e $origSrc/nix-support/hydra-release-name; then
+          releaseName=$(cat $origSrc/nix-support/hydra-release-name)
+      fi
+
+      installFlagsArray=(DESTDIR=$TMPDIR/inst)
+
+      # Prefix hackery because of a bug in stdenv (it tries to `mkdir
+      # $prefix', which doesn't work due to the DESTDIR).
+      configureFlags="--prefix=$prefix $configureFlags"
+      dontAddPrefix=1
+      prefix=$TMPDIR/inst$prefix
+    '';
+
+    doDist = true;
+
+    distPhase = ''
+      mkdir -p $out/tarballs
+      tar cvfj $out/tarballs/''${releaseName:-binary-dist}.tar.bz2 -C $TMPDIR/inst .
+    '';
+
+    finalPhase = ''
+      for i in $out/tarballs/*; do
+          echo "file binary-dist $i" >> $out/nix-support/hydra-build-products
+      done
+
+      # Propagate the release name of the source tarball.  This is
+      # to get nice package names in channels.
+      test -n "$releaseName" && (echo "$releaseName" >> $out/nix-support/hydra-release-name)
+    '';
+
+    meta = (if args ? meta then args.meta else {}) // {
+      description = "Build of a generic binary distribution";
+    };
+
+  }
+)