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/development/ocaml-modules/expat/0.9.nix

@@ -0,0 +1,54 @@
+{stdenv, lib, fetchurl, ocaml, findlib, ounit, expat}:
+
+let
+  pname = "ocaml-expat";
+  testcase = fetchurl {
+    url = "http://www.w3.org/TR/1998/REC-xml-19980210.xml";
+    sha256 = "00a3gsfvlkdhmcbziqhvpvy1zmcgbcihfqwcvl6ay03zf7gvw0k1";
+  };
+
+in
+
+stdenv.mkDerivation rec {
+  name = "${pname}-${version}";
+  version = "0.9.1";
+
+  src = fetchurl {
+    url = "http://www.xs4all.nl/~mmzeeman/ocaml/${pname}-${version}.tar.gz";
+    sha256 = "16n2j3y0jc9xgqyshw9plrwqnjiz30vnpbhahmgxlidbycw8rgjz";
+  };
+
+  nativeBuildInputs = [ocaml findlib ];
+  buildInputs = [ ounit expat];
+
+  strictDeps = true;
+
+  createFindlibDestdir = true;
+
+  patches = [ ./unittest.patch ];
+
+  postPatch = ''
+    substituteInPlace "unittest.ml" \
+      --replace "/home/maas/xml-samples/REC-xml-19980210.xml.txt" "${testcase}"
+    substituteInPlace Makefile --replace "EXPAT_LIBDIR=/usr/local/lib" "EXPAT_LIBDIR=${expat.out}/lib" \
+      --replace "EXPAT_INCDIR=/usr/local/include" "EXPAT_INCDIR=${expat.dev}/include" \
+      --replace "gcc" "\$(CC)"
+  '';
+
+  dontConfigure = true;  	# Skip configure
+
+  buildPhase = ''
+    make all allopt
+  '';
+
+  doCheck = true;
+
+  checkTarget = "testall";
+
+  meta = {
+    homepage = "http://www.xs4all.nl/~mmzeeman/ocaml/";
+    description = "An ocaml wrapper for the Expat XML parsing library";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.roconnor ];
+  };
+}