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/misc/tthsum/default.nix

@@ -0,0 +1,42 @@
+{ lib, stdenv, fetchurl }:
+
+stdenv.mkDerivation rec {
+  pname = "tthsum";
+  version = "1.3.2";
+
+  src = fetchurl {
+    url = "http://tthsum.devs.nu/pkg/tthsum-${version}.tar.bz2";
+    sha256 = "0z6jq8lbg9rasv98kxfs56936dgpgzsg3yc9k52878qfw1l2bp59";
+  };
+
+  installPhase = ''
+    mkdir -p $out/bin $out/share/man/man1
+    cp share/tthsum.1.gz $out/share/man/man1
+    cp obj-unix/tthsum $out/bin
+  '';
+
+  doCheck = !stdenv.isDarwin;
+
+  meta = with lib; {
+    broken = stdenv.isDarwin;
+    description = "An md5sum-alike program that works with Tiger/THEX hashes";
+    longDescription = ''
+      tthsum generates or checks TTH checksums (root of the THEX hash
+      tree). The Merkle Hash Tree, invented by Ralph Merkle, is a hash
+      construct that exhibits desirable properties for verifying the
+      integrity of files and file subranges in an incremental or
+      out-of-order fashion. tthsum uses the Tiger hash algorithm for
+      both the internal and the leaf nodes.
+
+      The specification of the Tiger hash algorithm is at:
+      http://www.cs.technion.ac.il/~biham/Reports/Tiger/
+
+      The specification of the THEX algorithm is at:
+      http://adc.sourceforge.net/draft-jchapweske-thex-02.html
+    '';
+    homepage = "http://tthsum.devs.nu/";
+    license = licenses.gpl3Plus;
+    maintainers = [ maintainers.ebzzry ];
+    platforms = platforms.unix;
+  };
+}