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/tools/filesystems/unionfs-fuse/default.nix

@@ -0,0 +1,51 @@
+{ lib, stdenv, fetchFromGitHub, cmake, fuse }:
+
+stdenv.mkDerivation rec {
+  pname = "unionfs-fuse";
+  version = "2.2";
+
+  src = fetchFromGitHub {
+    owner = "rpodgorny";
+    repo = "unionfs-fuse";
+    rev = "v${version}";
+    sha256 = "sha256-EJryML6E0CW4kvsqMRqV3cq77j50HuylNzgaHD6CL/o=";
+  };
+
+  patches = [
+    # Prevent the unionfs daemon from being killed during
+    # shutdown. See
+    # http://www.freedesktop.org/wiki/Software/systemd/RootStorageDaemons/
+    # for details.
+    ./prevent-kill-on-shutdown.patch
+  ];
+
+  postPatch = lib.optionalString stdenv.isDarwin ''
+    substituteInPlace CMakeLists.txt \
+      --replace '/usr/local/include/osxfuse/fuse' '${fuse}/include/fuse'
+  '';
+
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ fuse ];
+
+  # Put the unionfs mount helper in place as mount.unionfs-fuse. This makes it
+  # possible to do:
+  #   mount -t unionfs-fuse none /dest -o dirs=/source1=RW,/source2=RO
+  #
+  # This must be done in preConfigure because the build process removes
+  # helper from the source directory during the build.
+  preConfigure = lib.optionalString (!stdenv.isDarwin) ''
+    mkdir -p $out/sbin
+    cp -a mount.unionfs $out/sbin/mount.unionfs-fuse
+    substituteInPlace $out/sbin/mount.unionfs-fuse --replace mount.fuse ${fuse}/sbin/mount.fuse
+    substituteInPlace $out/sbin/mount.unionfs-fuse --replace unionfs $out/bin/unionfs
+  '';
+
+  meta = with lib; {
+    broken = stdenv.isDarwin;
+    description = "FUSE UnionFS implementation";
+    homepage = "https://github.com/rpodgorny/unionfs-fuse";
+    license = licenses.bsd3;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ orivej ];
+  };
+}

pkgs/tools/filesystems/unionfs-fuse/prevent-kill-on-shutdown.patch

@@ -0,0 +1,14 @@
+diff -ru -x '*~' unionfs-fuse-0.26-orig/src/unionfs.c unionfs-fuse-0.26/src/unionfs.c
+--- unionfs-fuse-0.26-orig/src/unionfs.c	2012-09-11 00:06:32.000000000 +0200
++++ unionfs-fuse-0.26/src/unionfs.c	2014-05-21 14:22:03.597861805 +0200
+@@ -831,6 +831,10 @@
+ 	}
+ #endif
+ 
++	/* Prevent systemd's shutdown from killing us. */
++	if (access("/etc/initrd-release", F_OK) >= 0)
++		argv[0][0] = '@';
++
+ 	umask(0);
+ 	int res = fuse_main(args.argc, args.argv, &unionfs_oper, NULL);
+ 	RETURN(uopt.doexit ? uopt.retval : res);