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/libraries/skalibs/default.nix

@@ -0,0 +1,39 @@
+{ skawarePackages, pkgs }:
+
+with skawarePackages;
+
+buildPackage {
+  pname = "skalibs";
+  version = "2.11.2.0";
+  sha256 = "sha256-ZJzzI2/jED9FNmthlrG80EV8nBfKhvK4AAdpaiuqe3c=";
+
+  description = "A set of general-purpose C programming libraries";
+
+  outputs = [ "lib" "dev" "doc" "out" ];
+
+  configureFlags = [
+    # assume /dev/random works
+    "--enable-force-devr"
+    "--libdir=\${lib}/lib"
+    "--dynlibdir=\${lib}/lib"
+    "--includedir=\${dev}/include"
+    "--sysdepdir=\${lib}/lib/skalibs/sysdeps"
+    # Empty the default path, which would be "/usr/bin:bin".
+    # It would be set when PATH is empty. This hurts hermeticity.
+    "--with-default-path="
+  ];
+
+  postInstall = ''
+    rm -rf sysdeps.cfg
+    rm libskarnet.*
+
+    mv doc $doc/share/doc/skalibs/html
+  '';
+
+  passthru.tests = {
+    # fdtools is one of the few non-skalib packages that depends on skalibs
+    # and might break if skalibs gets an breaking update.
+    fdtools = pkgs.fdtools;
+  };
+
+}