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/analysis/egypt/default.nix

@@ -0,0 +1,32 @@
+{ lib, fetchurl, perlPackages }:
+
+perlPackages.buildPerlPackage rec {
+  pname = "egypt";
+  version = "1.10";
+
+  src = fetchurl {
+    sha256 = "0r0wj6v8z9fzlh9pb5617kyjdf92ppmlbzajaarrq729bbb6ln5m";
+    url = "https://www.gson.org/egypt/download/${pname}-${version}.tar.gz";
+  };
+
+  outputs = [ "out" ];
+
+  enableParallelBuilding = true;
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = "Tool for making call graphs of C programmes";
+    longDescription = ''
+      Egypt is a simple tool for creating call graphs of C programs. It neither
+      analyzes source code nor lays out graphs. Instead, it leaves the source
+      code analysis to GCC and the graph layout to Graphviz, both of which are
+      better at their respective jobs than egypt itself could ever hope to be.
+      Egypt is simply a very small Perl script that glues these existing tools
+      together.
+    '';
+    homepage = "http://www.gson.org/egypt/";
+    license = with licenses; [ artistic1 gpl1Plus ];
+    platforms = platforms.unix;
+  };
+}