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/tools/misc/rman/default.nix

@@ -0,0 +1,34 @@
+{lib, stdenv, fetchurl}:
+
+stdenv.mkDerivation rec {
+  pname = "rman";
+  version = "3.2";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/polyglotman/${version}/${pname}-${version}.tar.gz";
+    sha256 = "0prdld6nbkdlkcgc2r1zp13h2fh8r0mlwxx423dnc695ddlk18b8";
+  };
+
+  postPatch = ''
+    substituteInPlace Makefile \
+      --replace ginstall install \
+      --replace gcc '${stdenv.cc.targetPrefix}cc'
+  '';
+
+  makeFlags = [ "BINDIR=$(out)/bin" "MANDIR=$(out)/share/man" ];
+
+  preInstall = ''
+    mkdir -p $out/bin
+    mkdir -p $out/share/man
+  '';
+
+  hardeningDisable = [ "format" ];
+
+  doCheck = false; # "check" target is probably meant to do "installcheck" or something
+
+  meta = {
+    description = "Parse formatted man pages and man page source from most flavors of UNIX and converts them to HTML, ASCII, TkMan, DocBook, and other formats";
+    license = "artistic";
+    platforms = lib.platforms.all;
+  };
+}