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/os-specific/linux/cramfsswap/default.nix

@@ -0,0 +1,31 @@
+{lib, stdenv, fetchurl, zlib}:
+
+stdenv.mkDerivation rec {
+  pname = "cramfsswap";
+  version = "1.4.2";
+
+  src = fetchurl {
+    url = "mirror://debian/pool/main/c/cramfsswap/${pname}_${version}.tar.xz";
+    sha256 = "10mj45zx71inaa3l1d81g64f7yn1xcprvq4v4yzpdwbxqmqaikw1";
+  };
+  #  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=996964
+  patches = [ ./parallel-make.patch ];
+
+  # Needed for cross-compilation
+  postPatch = ''
+    substituteInPlace Makefile --replace 'strip ' '$(STRIP) '
+  '';
+
+  buildInputs = [zlib];
+
+  installPhase = ''
+    install --target $out/bin -D cramfsswap
+  '';
+
+  meta = with lib; {
+    description = "Swap endianess of a cram filesystem (cramfs)";
+    homepage = "https://packages.debian.org/sid/utils/cramfsswap";
+    license = licenses.gpl2Only;
+    platforms = platforms.linux;
+  };
+}

pkgs/os-specific/linux/cramfsswap/parallel-make.patch

@@ -0,0 +1,14 @@
+Fix parallel build failure bya dding the dependency.
+
+https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=996964
+--- a/Makefile
++++ b/Makefile
+@@ -6,7 +6,7 @@ debian: cramfsswap
+ cramfsswap: cramfsswap.c
+ 	$(CC) -Wall -g -O $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -o cramfsswap cramfsswap.c -lz
+ 
+-strip:
++strip: cramfsswap
+ 	strip cramfsswap
+ 
+ install: cramfsswap