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/db/generic.nix

@@ -0,0 +1,57 @@
+{ lib, stdenv, fetchurl
+, cxxSupport ? true
+, compat185 ? true
+, dbmSupport ? false
+
+# Options from inherited versions
+, version, sha256
+, extraPatches ? [ ]
+, license ? lib.licenses.sleepycat
+, drvArgs ? {}
+}:
+
+stdenv.mkDerivation (rec {
+  pname = "db";
+  inherit version;
+
+  src = fetchurl {
+    url = "https://download.oracle.com/berkeley-db/${pname}-${version}.tar.gz";
+    sha256 = sha256;
+  };
+
+  patches = extraPatches;
+
+  outputs = [ "bin" "out" "dev" ];
+
+  configureFlags =
+    [
+      (if cxxSupport then "--enable-cxx" else "--disable-cxx")
+      (if compat185 then "--enable-compat185" else "--disable-compat185")
+    ]
+    ++ lib.optional dbmSupport "--enable-dbm"
+    ++ lib.optional stdenv.isFreeBSD "--with-pic";
+
+  preConfigure = ''
+    cd build_unix
+    configureScript=../dist/configure
+  '';
+
+  postInstall = ''
+    rm -rf $out/docs
+  '';
+
+  enableParallelBuilding = true;
+
+  doCheck = true;
+
+  checkPhase = ''
+    make examples_c examples_cxx
+  '';
+
+  meta = with lib; {
+    homepage = "http://www.oracle.com/technetwork/database/database-technologies/berkeleydb/index.html";
+    description = "Berkeley DB";
+    license = license;
+    platforms = platforms.unix;
+  };
+} // drvArgs)